Al-Khayat (1996)†, Collins et al. (1984), Naderloo (2017)†, Naderloo & Türkay (2012)†, Naderloo et al. (2010)†, Naser et al. (2010)†, Rosenberg (2020)†, Shih et al. (2022)†
Entries marked with † represent indirect references to location through citation.