For citations:
Inyakina N., Musidray A., Nikitkina E., Mukhachev E., Politov V., Shiryaev G. Variability of the content of serum testosterone in belugas of Delphinapterus leucas of different ages. Genetics and breeding of animals. 2020;(1):22-26. (In Russ.) https://doi.org/10.31043/2410-2733-2020-1-22-26