[1. Skrzyński S. Deep diving in underwater works in Poland, Polish Hyperbaric Research 2(67) 2019, 69-92. http://doi.org/10.2478/phr-2019-0007;]Search in Google Scholar
[2. Jóźwiak D. Siermontowski P. Dąbrowiecki Z. Olszański R. Analysis of the risk of diving accidents in military and recreational diving, Polish Hyperbaric Research 4(53) 2015, 41-54. DOI 10.1515/phr-2015-0022;10.1515/phr-2015-0022]Search in Google Scholar
[3. Law on entrepreneurs of 6 March 2018. (Journal of Laws 2018 No 646)]Search in Google Scholar
[4. Law on Associations of 7 April 1989 (Journal of Laws of 7 April 1989). 1989 No. 20 item.104);]Search in Google Scholar
[5. The Civil Code Act of 23 April 1964 (Journal of Laws 1964 No 16 item 93);]Search in Google Scholar
[6. The Criminal Code Act of 6 June 1997 (Journal of Laws of 6 June 1997). 1997 no 88 item 553);]Search in Google Scholar
[7. Standards PN-EN: PN-EN 14467. Recreational diving services. Requirements for service providers; PN-EN 14153-1. Recreational diving services. Minimum safety requirements for the training of recreational divers. Part 1: Level 1 - Supervised diver; PN-EN 14153-2. Recreational diving services. Minimum safety requirements for training of recreational divers. Part 2: Level 2 - Autonomous diver; PN-EN 14153-3. Recreational diving services. Minimum safety requirements for training of recreational divers. Part 3: Level 3 - Diving guide; PN-EN 250. Breathing equipment. Open-circuit compressed-air diving apparatus. Requirements, testing, marking; PN-EN 1809. Diving gear. Buoyancy compensators. Functional and safety requirements, test methods; PN-EN 12628. Diving gear. Rescue and buoyancy equipment. Functionality and safety requirements and test methods; PN-EN 13319. Diving gear. Depth gauges and combined instruments for measuring depth and time. Functionality and safety requirements and test methods; PN-EN 1968. Periodic inspection and testing of steel seamless gas cylinders; PN-EN 1802. Gas cylinders. Periodic inspection and testing of seamless aluminium alloy gas cylinders;]Search in Google Scholar
[8. https://www.pttk.pl/ks3/dok/k17_u240_z01_20110618.pdf [accessed on 2019-12-7];]Search in Google Scholar
[9. Zawadzki D. Use of flooded quarries and excavations in specialised tourism - recreational diving. in: Współczesne problemy badań geograficznych, Wybrane problemy geografii turyzmu, Wydawnictwo Naukowe Uniwersytetu Szczecińskiego 2013, str.255-267. https://www.researchgate.net/publication/259930463 [cytowano 2019-12-7];]Search in Google Scholar
[10. Pietrzyk-Sokulska E. Water reservoirs in post-mining excavations – a new element of attractiveness of the city landscape. In: KRAJOBRAZ A TURYSTYKA, Prace Komisji Krajobrazu Kulturowego No. 14, Komisja Krajobrazu Kulturowego PTG 2010, 264-272. ISSN: 1896-1460, ISBN: 978-83-61695-06-6;]Search in Google Scholar
[11. Pietrzyk-Sokulska E. Quarry water reservoirs as a new landscape element. Przegląd Geologiczny, vol.63, no. 8 2015: 464-469, bwmeta1.element.baztech-c645369b-8b5c-48f3-acd1-a6b38f467598 [accessed on 2019-12-7];]Search in Google Scholar
[12. Berbeka J. Interdependence of diving and tourism. In: Gaworecki W.W, Mroczyńska Z. redaktorzy. Turystyka i sport dla wszystkich w promocji zdrowego stylu życia. publ. Gdańsk WSTiH; 2008, 457-458. ISBN: 978-83-7531-072-6;]Search in Google Scholar
[13. bazapiechcin.eu/index.php?option=com_content&view=article&id=52&Itemid=59 [accessed on 2019-12-7];]Search in Google Scholar
[14. albikrosno.pl/wykaz-stopni-nurkowych [accessed on 2019-12-7];]Search in Google Scholar
[15. nurkowanienapoleon.pl/stopnie-nurkowe/ptn-pletwonurek-turystyczny-nadzorowany/ [accessed on 2019-12-7];]Search in Google Scholar
[16. https://www.underwater.pl/kursy-nurkowania/padi-divemaster.html [accessed on 2019-12-7];]Search in Google Scholar
[17. Cichowska J., Garbacz J.K, Ciechalski J. The role of the Piechcin base in the development of specialised tourism with a view to diver preparation for penetration of the Baltic Sea. Polish Hyperbaric Research 2018 2(63), 51-61. DOI: 10.2478/phr-2018-0013;]Search in Google Scholar
[18. Bański J. Conditions for the development of entrepreneurship in rural areas – selected issues. In: Roczniki Naukowe Ekonomii Rolnictwa i Rozwoju Obszarów Wiejskich. T. 102, Z.1 2015, 59-69. ISSN 2353-4362.]Search in Google Scholar