My East European Karaite DNA study's results have been published in a peer-reviewed journal:
"The Genetics of Crimean Karaites" by Kevin Alan Brook
in Karadeniz Araştırmaları (Journal of Black Sea Studies), No. 42 (Summer 2014): pages 69-84
I also presented a summary of these results on pages 213-215 of my peer-reviewed book "The Jews of Khazaria, Third Edition" (Rowman and Littlefield Publishers, 2018).
Kevin Alan Brook