Giraldo, A., Gómez, C. and Rodríguez, E. (2002) “Shell-size variation of Notoacmea biradiata (Archaeogastropoda: Acmaeidae) as a response to gastropod density and height in shore in the Colombian Pacific coast”, Ciencias Marinas, 28(3), pp. 237–246. doi: 10.7773/cm.v28i3.228.