Camarena, F., and A. Carvacho. “Behavioral Patterns And Derived Hierarchy In Shell Fighting Among Hermit Crabs Pagurus Samuelis (Stimpson, 1857)”. Ciencias Marinas, vol. 12, no. 3, Mar. 1987, pp. 1-9, doi:10.7773/cm.v12i3.521.