[
1. Bąk I. (2017). Expenses of farms 50+ for free time management – statistical analysis. Prace Naukowe Uniwersytetu Ekonomicznego we Wrocławiu 475, 33-44. [in Polish]10.15611/pn.2017.475.03
]Search in Google Scholar
[
2. Lenartowicz M., Isidori E., Maussier B. (2016). Sport and tourism between modernity and postmodernity. Polish Journal of Sport and Tourism 23(2), 65-69.10.1515/pjst-2016-0007
]Search in Google Scholar
[
3. Kwilecki K. (2011). Leisure time considerations. Selected issues. Katowice: Górnośląska Wyższa Szkoła Handlowa im. Wojciecha Korfantego. [in Polish]
]Search in Google Scholar
[
4. Kwilecka M., Brożek Z. (2007). Direct recreation functions. Warszawa: Almamer Wyższa Szkoła Ekonomiczna. [in Polish]
]Search in Google Scholar
[
5. Dąbrowski A. (2006). Outline of the theory of motor recreation. Warszawa: DrukTur. [in Polish]
]Search in Google Scholar
[
6. Tribe J. (2011). The economics of recreation, leisure, and tourism. 4th Edition. Oxford, England: Elsevier.10.4324/9780080890517
]Search in Google Scholar
[
7. Webster D. (2019). Recreation. In: M. Westcott (ed.), Introduction to tourism and hospitality in BC (pp. 110-134), Victoria: BCcampus.
]Search in Google Scholar
[
8. Podolec B. (2014). Selected aspects of analyzing the living conditions of the population in Poland. Quantitative methods in empirical research. Kraków: Krakowska Akademia im. Andrzeja Frycza Modrzewskiego.[in Polish]
]Search in Google Scholar
[
9. Wolberg J. (2006). Data analysis using the method of least squares: Extracting the most information from experiments. Berlin: Springer.
]Search in Google Scholar
[
10. Cantrell C.A. (2008). Technical note: Review of methods for linear least-squares fitting of data and application to atmospheric chemistry problems. Atmospheric Chemistry and Physics 8, 5477-5487.10.5194/acp-8-5477-2008
]Search in Google Scholar
[
11. Kong M., Li D., Zhang D. (2018). Research on the application of improved least square method in linear fitting. IOP Conference Series: Earth and Environmental Science 252(5), 1-6. DOI: 10.1088/1755-1315/252/5/052158.10.1088/1755-1315/252/5/052158
]Search in Google Scholar
[
12. Usakli A., Kucukergin K.G. (2018). Using partial least squares structural equation modeling in hospitality and tourism. Do researchers follow practical guidelines? International Journal of Contemporary Hospitality Management 30(11), 3462-3512. DOI: 10.1108/ijchm-11-2017-0753.10.1108/IJCHM-11-2017-0753
]Search in Google Scholar
[
13. Malesa K., Malesa T. (2017). Consumption among young people in Poland. Zarządzanie Innowacyjne w Gospodarce i Biznesie 1(24), 125-138. [in Polish]
]Search in Google Scholar
[
14. Adamczyk G. (2014). Selected aspects of young consumer behaviour in new market realities. Handel Wewnętrzny 354, 5-16. [in Polish]
]Search in Google Scholar
[
15. Śleszyńska-Świderska A. (2017). Behaviours of Polish consumers in the conditions of the global economic crisis. Dissertation. Białystok: Uniwersytet w Białymstoku. [in Polish]
]Search in Google Scholar
[
16. Ghete A.M. (2015). The importance of youth tourism. Annals of Faculty of Economics 1(2), 688-694.
]Search in Google Scholar
[
17. Horak S., Weber S. (2000). Youth tourism in europe: Problems and prospects. Tourism Recreation Research 25(3), 37-44.10.1080/02508281.2000.11014923
]Search in Google Scholar
[
18. Demeter T., Bratucu G. (2014). Typologies of youth tourism. Bulletin of the Transilvania University of Braşov, Series V: Economic Sciences 7(56)1, 115-122.
]Search in Google Scholar
[
19. Buffa F. (2015). Young tourists and sustainability. Profiles, attitudes, and implications for destination strategies. Sustainability 7, 14042-14062, DOI: 10.3390/su71014042.10.3390/su71014042
]Search in Google Scholar
[
20. Cakar K., Seyitoglu F. (2016). Youth tourism: Understanding the youth travellers’ motivations, Conference Paper, Retrieved February 10, 2020, from https://www.research-gate.net/publication/304251211_Youth_Tourism_Understanding_the_Youth_Travellers’_Motivations.
]Search in Google Scholar
[
21. Yunusovich S.S. (2018). Youth tourism as a scientific research object. Journal of Tourism and Hospitality 7(5), DOI: 10.4172/2167-0269.1000378.10.4172/2167-0269.1000378
]Search in Google Scholar
[
22. Pierzchalska A., Klag P. (2008). Social roles of the elderly. In: W. Bokajło, A. Pacześniak (ed.), Equality in the European Union - theory and practice (pp. 437-448), Wrocław: Wrocławskie Wydawnictwo Naukowe Atla 2. [in Polish]
]Search in Google Scholar
[
23. Alejziak W. (2009). Determinants and social diversity of tourist activity. Studia i Monografie 56. Kraków: Akademia Wychowania Fizycznego im. Bronisława Czecha w Krakowie. [in Polish]
]Search in Google Scholar
[
24. Bąk I. (2013). Statistical analysis of senior tourist activity in Poland. Szczecin: Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie. [in Polish]
]Search in Google Scholar
[
25. Bai B., Jang S.S., Cai L.A., O’Leary J.T. (2001). Determinants of travel mode choice of senior travelers to the United States. Journal of Hospitality and Leisure Marketing 8(3/4), 147-168.10.1300/J150v08n03_10
]Search in Google Scholar
[
26. Sedgley D., Pritchard A., Morgan N. (2011). Tourism and aging: a transformative research agenda. Annals of Tourism Research 38(2), 422-436.10.1016/j.annals.2010.09.002
]Search in Google Scholar
[
27. Kim H., Woo E., Uysal M. (2015). Tourism experience and quality of life among elderly tourists. Tourism Management 46, 465-476. DOI: 10.1016/j.tourman.2014.08.002.10.1016/j.tourman.2014.08.002
]Search in Google Scholar
[
28. Niedzielska E., Guszkowska M., Kozdroń E., Leś A., Krynicki B., Piotrowska J. (2017). Quality of life and its correlates in students of a university of the third age. Polish Journal of Sport and Tourism 24(1), 35-48.10.1515/pjst-2017-0005
]Search in Google Scholar
[
29. Jang S., Bai B., Hu C., Wu C.M. (2009). Affect, travel motivation, and travel intention: a senior market. Journal of Hospitality and Tourism Research 33(1), 51-73.10.1177/1096348008329666
]Search in Google Scholar
[
30. Norman W.C., Daniels M.J., McGuire F., Norman C.A. (2001). Whither the mature market: an empirical examination of the travel motivations of neo-mature and veteran-mature markets. Journal of Hospitality and Leisure Marketing 8(3), 113-130.10.1300/J150v08n03_08
]Search in Google Scholar
[
31. Woo E., Kim H., Uysal M. (2014). A measure of quality of life in elderly tourists. Applied Research Quality Life 11(1), 65-82. DOI: 10.1007/s11482-014-9355-x.10.1007/s11482-014-9355-x
]Search in Google Scholar
[
32. Alen E., Dominguez T., Losada N. (2012). New opportunities for the tourism market: Senior tourism and accessible tourism. In: M. Kasimoglu (ed.), Visions for global tourism industry (pp. 139-166), Open access peer-reviewed Edited Volume. Retrieved February 22, 2020, from https://www.intechopen.com/books/visions-for-global-tourism-industry-creating-and-sustaining-competitive-strategies/new-opportunities-for-the-tourism-market-senior-tourism-and-accessible-tourism.
]Search in Google Scholar
[
33. United Nations (1949). Universal Declaration of Human Rights 1948. Retrieved February 20, 2020, from https://www.jus.uio.no/lm/en/pdf/un.universal.declaration.of.human.rights.1948.portrait.letter.pdf.
]Search in Google Scholar
[
34. Eurostat (2017). Quality of life in Europe – facts and views – leisure and social relations. Retrieved February 19, 2020, from https://ec.europa.eu/eurostat/statistics-explained/index.php?title=Archive:Quality_of_life_in_Europe_-_facts_and_views_-_leisure_and_social_relations&oldid=349424.
]Search in Google Scholar
