1. Effect of human chorionic gonadotropin on the gonads of Rana esculenta in organotypic culture during metamorphosis;Grassi-Milano;Riv. Biol,1971
2. Androgen transport and receptor mechanisms in testis and epididymis;Hansson,1975
3. Effects of exogenous gonadotropins of spermatogenetic activity in summer and autumn frogs;Iwasawa;Sci. Rep. Niigata Univ. Ser. D,1973
4. Failure of sex hormones and PMS to stimulate gonadal development in young Rana nigromaculata;Iwasawa;Gen. Comp. Endocrinol,1974
5. Development of the testis in the frog Rana nigromaculata, with special reference to germ cell maturation;Iwasawa;Copeia,1976