Piechowicz, J., M. Tęsiorowski, B. Jasiewicz, J. Sobok, M. Piechowicz, and W. Opoka. “Some Non-Operative Ways of Cervical Spine Treatment”. Medicina Internacia Revuo - International Medicine Review, no. 100, June 2013, pp. 120-4, https://interrev.com/mir/index.php/mir/article/view/94.