Boschi et al. (1992), Cremonte et al. (2007)†, Olivier et al. (1972), Pereyra et al. (2019)†, Rosenberg (2020)†, Spivak (1997), Spivak (1997)†, Spivak et al. (1994), Truchet et al. (2019)†, Valero et al. (1999)
Entries marked with † represent indirect references to location through citation.