V. J. Pilate, E. D. Chicarino, P. A. Daniel, E. O. Santos, L. C. da Silva, and E. C. de A. Bessa, “Behavioral study of the aggregation and site preference for resting in molluscs subulinideos in laboratory”, rnzool, vol. 7, no. 1, pp. 16–26, Feb. 2013.