Jiménez-Sierra C. L., Eguiarte L. E., Candy Barrel Cactus (Echinocactus platyacanthus Link & Otto): A Traditional Plant Resource in Mexico Subject to Uncontrolled Extraction and Browsing, Economic Botany, 2010, 64(2):99-108, doi: 10.1007/s12231-010-9119-y
Uses of Echinocactus platyacanthus and population status in Hidalgo, Querétaro and Puebla. The study compares density, plant size and signs of damage in relation to harvesting and grazing. The abstract was available.