Schuller L., P., Sepúlveda V., A., Ellies Sch., A. and Castillo S., A. (1999) “Use of 137Cs in quantitative evaluation of soil erosión and sedimentation in a Palehuniult, located at the 9th Región”, Agro sur, 27(1), pp. 29–36. doi: 10.4206/agrosur.1999.v27n1-04.