W.H. Lewis, E.J. Kennelly, G.N. Bass, H.J. Wedner i inni. Ritualistic use of the holly Ilex guayusa by Amazonian Jivaro Indians. „Journal of Ethnopharmacology”. 33 (1-2), s. 25-30, 1991-05. Elsevier BV. DOI: 10.1016/0378-8741(91)90156-8. ISSN0378-8741. (ang.).
Victor Manuel Patino. Guayusa, a neglected stimulant from the eastern andean foothills. „Economic Botany”. 22 (4), s. 311-316, 1968-10. Springer Nature. DOI: 10.1007/bf02908125. ISSN0013-0001. (ang.).
dx.doi.org
Michael A.M.A.RuggieroMichael A.M.A. i inni, A Higher Level Classification of All Living Organisms, „PLOS One”, 10 (4), 2015, art. nr e0119248, DOI: 10.1371/journal.pone.0119248, PMID: 25923521, PMCID: PMC4418965 [dostęp 2021-03-04](ang.).
iucnredlist.org
apiv3.iucnredlist.org
Ilex guayusa, [w:] The IUCN Red List of Threatened Species(ang.).
Michael A.M.A.RuggieroMichael A.M.A. i inni, A Higher Level Classification of All Living Organisms, „PLOS One”, 10 (4), 2015, art. nr e0119248, DOI: 10.1371/journal.pone.0119248, PMID: 25923521, PMCID: PMC4418965 [dostęp 2021-03-04](ang.).
W.H. Lewis, E.J. Kennelly, G.N. Bass, H.J. Wedner i inni. Ritualistic use of the holly Ilex guayusa by Amazonian Jivaro Indians. „Journal of Ethnopharmacology”. 33 (1-2), s. 25-30, 1991-05. Elsevier BV. DOI: 10.1016/0378-8741(91)90156-8. ISSN0378-8741. (ang.).
Victor Manuel Patino. Guayusa, a neglected stimulant from the eastern andean foothills. „Economic Botany”. 22 (4), s. 311-316, 1968-10. Springer Nature. DOI: 10.1007/bf02908125. ISSN0013-0001. (ang.).
