Links
[1] https://www.tourism.government.bg/sites/tourism.government.bg/files/documents/2020-12/english.pdf
[2] https://www.tourism.government.bg/sites/tourism.government.bg/files/documents/2020-12/de.pdf
[3] https://www.tourism.government.bg/sites/tourism.government.bg/files/documents/2020-12/fr.pdf
[4] https://www.tourism.government.bg/sites/tourism.government.bg/files/documents/2020-12/greece.pdf
[5] https://www.tourism.government.bg/sites/tourism.government.bg/files/documents/2020-12/romania.pdf
[6] https://www.tourism.government.bg/sites/tourism.government.bg/files/documents/2020-12/serbia.pdf
[7] https://www.tourism.government.bg/sites/tourism.government.bg/files/documents/2020-12/russia.pdf
[8] https://www.tourism.government.bg/sites/tourism.government.bg/files/documents/2020-12/turkey.pdf
[9] https://www.tourism.government.bg/sites/tourism.government.bg/files/documents/2020-12/bg.pdf