Immunoelectron microscopic visualization of intermediate basic proteins HPI1 and HPI 2 in human spermatids and spermatozoa Yann Prigent, Frédéric Troalen and Jean-Pierre DadouneReprod. Nutr. Dev., 38 4 (1998) 417-427DOI: https://doi.org/10.1051/rnd:19980406