J.  Geysen, Cardoen, J., van Eynde, S., Geens, C., and De Loof, A., ?Cellular and molecular markers of anteroposterior and dorsoventral organization in the vitellogenic follicles of adult Sarcophaga bullata (Diptera) and dorsoventral orientation of follicles in the ovary?, vol. 197, no. 2, pp. 101 - 109, Submitted.