^J. J. Rankin, THE STRUCTURE AND BIOLOGY OF VALLICULA MULTIFORMIS, GEN. ET SP. NOV., A PLATYCTENID CTENOPHORE, Zoological Journal of the Linnean Society, Volume 43, Issue 289, July 1956, Pages 55–71, https://doi.org/10.1111/j.1096-3642.1956.tb02507.x