Banaszewska D, Andraszek K, Czubaszek M, Biesiada Drzazga B. The effect of selected staining techniques on bull sperm morphometry. Anim Reprod Sci. 2015;159:17-24 pubmed publisher
..However, silver nitrate staining was best at identifying the structures of the sperm cell. Hence it is difficult to determine which of the staining methods most faithfully reveals the dimensions and shape of the bull sperm. ..
Andraszek K, GryziÅ„ska M, Ceranka M, Larisch A. Structure of nucleoli in first-order spermatocytes of selected free-living animal species. Anim Reprod Sci. 2015;161:16-22 pubmed publisher
..The size of the nucleolus and the nucleus of the spermatocyte is a species-specific trait associated with karyotype and the number of nucleolar organizer regions in a given species. ..