Kwiatkowska, B., J. Szczurowski, and D. Nowakowski. “Variation in ‘foramina transversaria’ of Human Cervical Vertebrae in the Medieval Population from Sypniewo (Poland)”. Anthropological Review, vol. 77, no. 2, July 2014, pp. 175-88, doi:10.2478/anre-2014-0014.