Yu, Wenyang, et al. “Seasonal Expressions of SPAG11A and Androgen Receptor in the Epididymis of the Wild Ground Squirrels (<em>Citellus dauricus< Em> Brandt)”. European Journal of Histochemistry, vol. 64, no. 2, Apr. 2020, doi:10.4081/ejh.2020.3111.