Altevogt (1959)†, Altevogt (1965)†, Alvarez (1968)†, Barea-Azcón et al. (2008)†, Crane (1975)†, Ewa-Oboho (1993)†, Gonzáles (2018)†, Gonzáles et al. (2017)†, Günther (1963)†, Manning & Holthuis (1981)†, Monod (1956), Rosenberg (2020), von Hagen (1962)†
Entries marked with † represent indirect references to location through citation.