Y-Chromosome Diversity in Modern Bulgarians: New Clues about Their Ancestry Karachanak, Sena ; Grugni, Viola ; Fornarino, Simona ; Nesheva, Desislava ; Al-Zahery, Nadia ; Battaglia, Vincenza ; Carossa, Valeria ; Yordanov, Yordan ; Torroni, Antonio ; Galabov, Angel S. ; Toncheva, Draga ; Semino, Ornella Abstract Publication: PLoS ONE Pub Date: March 2013 DOI: 10.1371/journal.pone.0056779 Bibcode: 2013PLoSO...856779K