Quiles-Guiñau, L., Gómez-Cabrero, A., Miquel-Feucht, M. and Aparicio-Bellver, L. 2016. Retrotransverse foramen in atlas vertebrae of the late 17th and 18th centuries. Italian Journal of Anatomy and Embryology. 121, 2 (Jun. 2016), 123–132.