Rohde, K., and N. A. Watson. 1994. “Ultrastructure of the Terminal Parts of the Protonephridial System of Baltoplana Magna (Platyhelminthes, Kalyptorhynchia, Schizorhynchia, Karkinorhynchidae)”. Malaysian Journal of Science 15 (1&2):13-19. http://mojes.um.edu.my/index.php/MJS/article/view/4739.