J. P. Díaz-Martínez, F. A. Benítez-Villalobos, and A. López-Serrano, “Density, spatial distribution and mortality rate of the sea urchin Diadema mexicanum (Diadematoida: Diadematidae) at two reefs of Bahías de Huatulco, Oaxaca, Mexico”, Rev. Biol. Trop., vol. 63, no. S2, pp. 173–182, Jun. 2015.