Ettelt J., Riedel W., Echinopsis klingleriana aus dem bolivianischen Tiefland, Kakteen und andere Sukkulenten, 2006, 57(10):262-265
Indexed excerpts of pages 262–263 were read, including habitats and two plants in Riedel’s collection. Older broadly identified Paraguayan records were excluded from the present species range. Cultivation advice from the separate E. chacoana account was not transferred.