Ortiz, MA, and WB Stotz. “Preliminary Estimation of Optimal Sample Size for Assessing the Recruitment of Mesodesma Donacium (Lamarck, 1818) on Beaches of Central-North Chile: Application of the Power Analysis”. Ciencias Marinas, vol. 29, no. 3, Mar. 2003, pp. 371-5, doi:10.7773/cm.v29i3.150.