Engel W, Keime S, Kremling H, Hameister H, Schluter G (Nov 1992). "The genes for protamine 1 and 2 (PRM1 and PRM2) and transition protein 2 (TNP2) are closely linked in the mammalian genome". Cytogenet Cell Genet. 61 (2): 158–9. doi:10.1159/000133397. PMID1395729.
Engel W, Keime S, Kremling H, Hameister H, Schluter G (Nov 1992). "The genes for protamine 1 and 2 (PRM1 and PRM2) and transition protein 2 (TNP2) are closely linked in the mammalian genome". Cytogenet Cell Genet. 61 (2): 158–9. doi:10.1159/000133397. PMID1395729.