Castro (2012)†, Ewa-Oboho (1993)†, Manning & Holthuis (1981), Ngo-Massou et al. (2018)†, Rodríguez et al. (1997)†, Rosenberg (2000)†, Rosenberg (2001)†, Shih et al. (2016)
Entries marked with † represent indirect references to location through citation.