To help differentiate the various species, a tabular and a polychotomous key are provided.
Stephen D. Cairns, Michelle L. Taylor 2019, 'An illustrated key to the species of the genus Narella (Cnidaria, Octocorallia, Primnoidae)',ZooKeyshttps://zookeys.pensoft.net/article/29922/. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Similar relationships and effect sizes were found using polychotomous conditional logistic regression.
Wahl Robert, Elasaad Huda, Wasilevich Elizabeth, Batterman Stuart, Li Shi, MukherjeeBhramar 2011, 'Asthma exacerbation and proximity of residence to major roads: a population-basedmatched case-control study among the pediatric Medicaid population in Detroit, Michigan',Environmental Healthhttp://www.ehjournal.net/content/10/1/34. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)