Villca-Coraniad, Huber; Nieto-Arizaad, Beatriz; Leónad, Raúl; Rocabadoa, José A.; Chippauxabd, Jean-Philippe; Urracd, Félix A. (30 October 2021). "First reports of envenoming by South American water snakes Helicops angulatus and Hydrops triangularis from Bolivian Amazon: A one-year prospective study of non-front-fanged colubroid snakebites". Toxicon. 202: 53–59. doi:10.1016/j.toxicon.2021.09.003. PMID34562494. S2CID237636615.
iucnredlist.org
Nogueira, C.; Gonzales, L.; Cisneros-Heredia, D.F.; Gagliardi, G.; Catenazzi, A.; Schargel, W.; Rivas, G.; Murphy, J. (2019). "Helicops angulatus". IUCN Red List of Threatened Species. 2019: e.T15178420A15178466. Retrieved 2 December 2021.
nih.gov
pubmed.ncbi.nlm.nih.gov
Villca-Coraniad, Huber; Nieto-Arizaad, Beatriz; Leónad, Raúl; Rocabadoa, José A.; Chippauxabd, Jean-Philippe; Urracd, Félix A. (30 October 2021). "First reports of envenoming by South American water snakes Helicops angulatus and Hydrops triangularis from Bolivian Amazon: A one-year prospective study of non-front-fanged colubroid snakebites". Toxicon. 202: 53–59. doi:10.1016/j.toxicon.2021.09.003. PMID34562494. S2CID237636615.
Villca-Coraniad, Huber; Nieto-Arizaad, Beatriz; Leónad, Raúl; Rocabadoa, José A.; Chippauxabd, Jean-Philippe; Urracd, Félix A. (30 October 2021). "First reports of envenoming by South American water snakes Helicops angulatus and Hydrops triangularis from Bolivian Amazon: A one-year prospective study of non-front-fanged colubroid snakebites". Toxicon. 202: 53–59. doi:10.1016/j.toxicon.2021.09.003. PMID34562494. S2CID237636615.