Aprilyanto et al. (2017)†, Crane (1975)†, El Serehy et al. (1994), El-Sayed et al. (2016), Fishelson (1971), Holthuis (1958), Kumar (2019)†, Lewinsohn (1977)†, Naderloo (2017)†, Por (1986)†, Por et al. (1977), Price et al. (1987)†, Shih et al. (2018)†, Shih et al. (2016), Shih et al. (2019), Shih & Poupin (2020), Shih et al. (2022), Vannini & Valmori (1981)†
Entries marked with † represent indirect references to location through citation.