1. Adams DC, Collyer ML, Kaliontzopoulou A (2018) Geomorph: software for geometric morphometric analyses. R package version 3.0.6. Available at: https://cran.r-project.org/package=geomorph
2. Adams DC, Rohlf FJ, Slice DE (2013) A field comes of age: geometric morphometrics in the 21st century. Hystrix 24:7-14
3. Astúa D (2010) Cranial sexual dimorphism in New World marsupials and a test of Rensch's rule in Didelphidae. J Mammal 91:1011-1024
4. Astúa D (2015) Morphometrics of the largest New World marsupials, opossums of the genus Didelphis Didelphimorphia, Didelphidae. Oecol Aust 19:117-142
5. Astúa de Moraes D, Hingst-Zaher E, Marcus LF, Cerqueira R (2000) A geometric morphometric analysis of cranial and mandibular shape variation in didelphid marsupials. Hystrix 11:115-130