7KORENBROT C C, HUHTANIEMI I T, WEINER R I. Preputial separation as an external sign of pubertal development in the male rat [J]. Siol Reprod,1977,17(2) :298 -303.
8RUSSELL L D. Mrophological and functional evidence for Sertoligerm cell relationships [ M]. //RUSSELL L D, GRISWOLD M D. The Sertoli Cell. Clearwater, Fla: Cache River Press,1993b : 365 - 390.
9AUMULLER G, SCHULZE C, VIEBAHN C. Intermediate filaments in Sertoli cells[J]. Microsc Res Tech, 1992, 20( 1 ) :50 -72.