References for Salpa cylindrica:

Bone, Q. (ed.), 1998. The biology of pelagic tunicates. Oxford University Press, Oxford. 340 pp.

Caron D. A., Madin L. P., and Cole J. J. (1989) Composition and degradation of salp fecal pellets: Implications for vertical flux in oceanic environments. Journal of Marine Research 47, 829-850