Konoplitsky, Viktor, Dmytro Dmytriiev, Oleksandr Kalinchuk, Denys Konoplitskyi, and Serhii Blazhko. “Bezoar gastrointestinal disease in children (literature review and interpretation of clinical observation)”. Perioperaciina Medicina 2, no. 2 (November 1, 2019): 50-56. Accessed January 19, 2020. https://perioperative.org.ua/index.php/prtmdc/article/view/35.