Links
[1] https://www.tourism.government.bg/sites/tourism.government.bg/files/documents/2021-12/zayavlenie_prilogenie_1.pdf
[2] https://www.tourism.government.bg/sites/tourism.government.bg/files/documents/2021-12/dogovor_10.2021.pdf
[3] https://www.tourism.government.bg/sites/tourism.government.bg/files/documents/2021-12/anketna_karta_prilogenie_3.pdf