Furst P. T., Ariocarpus retusus, the “False Peyote” of Huichol Tradition, Economic Botany, 1971, 25(2):182-187, doi: 10.1007/BF02860078
The historical publication concerns Ariocarpus retusus and “false peyote”. Available documentation includes the title and publisher's bibliographic details, retaining its status as an indirectly known source.