[
[1] Kanchevski. T, Hristov. M, The Schengen area as an foreign policy priority of Bulgaria, p. 542 and p. 543, XIV International scientific conference ISME, June 19-23 2016, Sozopol, Bulgaria, ISSN 1310-3946.
]Search in Google Scholar
[
[2] https://eur-lex.europa.eu/resource.html?uri=cellar:cff8990a-e1ee-11e5-8a50-01aa75ed71a1.0001.02/DOC_1&format=PDF
]Search in Google Scholar
[
[3] Kanchevski, T., Bulgaria in the foreign policy of the European Union after 2007, SNOWMOD Publishing 2021, p. 154. ISBN 978-619-91563-6-0.
]Search in Google Scholar
[
[4] Kanchevski, T., Bulgaria in the foreign policy of the European Union after 2007, SNOWMOD Publishing 2021, p. 154. ISBN 978-619-91563-6-0.
]Search in Google Scholar
[
[5] Krastev, D. EU justice and internal affairs agencies, Generis Publishing 2020, p.45. ISBN 978-9975-153-67-6.
]Search in Google Scholar
[
[6] Kanchevski, T., Bulgaria in the foreign policy of the European Union after 2007, SNOWMOD Publishing 2021, p. 159-160. ISBN 978-619-91563-6-0.
]Search in Google Scholar
[
[7] Krastev, D. Cooperation in the field of criminal policy in realization the EU, Scholar’s Press, 2018, p.81. ISBN 978-620-2-31736-8.
]Search in Google Scholar
[
[8] What does Bulgaria gain from Schengen, Aktiv Konsult, http://activeconsult.wordpress.com/2013/03/09/%d0%ba%d0%b0%d0%ba%d0%b2%d0%be-%d0%bf%d0%b5%d1%87%d0%b5%d0%bb%d0%b8-%d0%b1%d1%8a%d0%bb%d0%b3%d0%b0%d1%80%d0%b8%d1%8f-%d0%be%d1%82-%d1%88%d0%b5%d0%bd%d0%b3%d0%b5%d0%bd/
]Search in Google Scholar
