• [Wiki] http://en.wikipedia.org/wiki/Pegea.
• [Kooy2010] Kooijman, S. (2010). Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge.
• [MadiPurc1992] Madin, L. P. and Purcell, J. E. (1992). Feeding, metabolism, and growth of Cyclosalpa bakeri in the subarctic Pacific. Limnol. Oceanogr., 37(6):1236--1251.
• [MadiPurc1998] Madin, L. P. and Purcell, J. E. (1998). Feeding and energetics of thaliacea. In Bone, Q., editor, The biology of pelagic tunicates, pages 81--103. Oxford Univ. Press.