Solé-Cava, A.M.; Klautau, M.; Boury-Esnault, N.; Borojevic, R.; Thorpe, J.P. (1991). Genetic evidence for cryptic speciation in allopatric populations of two cosmopolitan species of the calcareous sponge genus
Clathrina.
Marine Biology. 111(3): 381-386.