Fraser, C. M. (1938). Hydroids of the 1934 Allan Hancock Pacific Expedition. <em>Allan Hancock Pacific Expeditions.</em> 4: 1-105, pls 1-15., available online athttps://www.biodiversitylibrary.org/page/4678840 page(s): 35, pl. 8 fig. 38 [details]
Schuchert, P. (2024). World Hydrozoa Database. Obelia alternata Fraser, 1938. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=292628 on 2024-07-25
original descriptionFraser, C. M. (1938). Hydroids of the 1934 Allan Hancock Pacific Expedition. <em>Allan Hancock Pacific Expeditions.</em> 4: 1-105, pls 1-15., available online athttps://www.biodiversitylibrary.org/page/4678840 page(s): 35, pl. 8 fig. 38 [details]