Mańkowska-Pliszka, H., U. Wieczorek, J. Wysocki, and J. Tomczyk. “Multiple Anomalies in the Atlanto-Occipital Joint (articulation Atlanto-Occipitalis)”. Anthropological Review, vol. 76, no. 1, June 2013, pp. 95-99, doi:10.2478/anre-2013-0011.