Oroño, E.S. 2007.

Taxonomic review of the Spixia pyriformis species complex  (Gastropoda: Pulmonata: Odontostominae)

. Zootaxa. 1498, 1 (Jun. 2007), 1–25. DOI:https://doi.org/10.11646/zootaxa.1498.1.1.