Porzych, Piotr, et al. “Uncovertebral Joints – Their Structure, Development and Relationships With Intervertebral Discs of Cervical Spine”. Journal of Education, Health and Sport, vol. 7, no. 8, Aug. 2017, pp. 774-85, https://apcz.umk.pl/JEHS/article/view/4812.