Hapon HO, Pavlovich OV, Yurchuk TO, Repin MV, Marchenko LM. Ultrastructural Characteristics of Human Sperm After Cryopreservation with Polyvinylpiralidon by Vitrification. Probl Cryobiol Cryomed [Internet]. 2019Jun.20 [cited 2024Nov.21];29(2):178. Available from: https://cryo.org.ua/journal/index.php/probl-cryobiol-cryomed/article/view/1516