1. Afzelius BA, Eliasson R, Johnsen O, Lindholmer C: Lack of dynein arms in immotile human spermatozoa. J Cell Biol 66: 225–232, 1975.
2. Baccetti B, Burrini A, Pallini V, Renieri T, Rosati F, Menchini-Fabris GF: The short-tailed human spermatozoa: ultrastructural alterations and dynein absence. J Submicr Cytol 7: 349–359, 1975.
3. Baccetti B, Renieri T, Rosati F, Selmi MG, Casanova S: Further observations on the morphogenesis of the round-headed human spermatozoa. Andrologia 9: 255–264, 1977.
4. Burgos MH, Vitale-Calpe R, Aoki A: Fine structure of the testis and its functional significance. In: The testis, Johnson AD, Gomes WR, Vandemark NL (eds), New York, Academic Press, 1970, p 551–649.
5. Bustos-Obregon E, Courot M, Flechon JE, Hochereau de Reviers M-T, Holstein AF: Morphological appraisal of gametogenesis: spermatogenetic process in mammals with particular reference to man. Andrologia 7: 141–163, 1975.