Fausto, A M Comparative spermatology in Plecoptera (Insecta). II. An ultrastructural investigation on four species of Systellognatha. [electronic resource] - Arthropod structure & development Nov 2002 - 147-56 p. digital Publication Type: Journal Article ISSN: 1873-5495 Standard No.: 10.1016/s1467-8039(02)00024-5 doi