1. Identification of alkaloid intermediates by gas chromatography–mass spectrometry. I. Potential mescaline precursors in Trichocereus species;Agurell;Lloydia,1969
2. Cactaceae alkaloids. I;Agurell;Lloydia,1969
3. Cactaceae alkaloids. X. Alkaloids of Trichocereus species and some other cacti;Agurell;Lloydia,1971
4. Anon., 2007. Oral statement on current indigenous use of Peruvian E. pachanoi in shamanic practice, by indigenous plant dealer who requested anonymity.