Bulgarian-American Cultural Center Madara - Boston & New York,
Y-Chromosome Diversity in Modern Bulgarians: New Clues about Their…
Y-Chromosome Diversity in Modern Bulgarians: New Clues about Their…
С поглед назад, много назад...
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0056779
www.plosone.org