Orlov, Y., T. Verkhoglyadova, T. Malysheva, L. Guslitser, N. Plavskiy, and A. Shaverskyi. “Dynamics of Neuro-Oncological Morbidity in Children in Ukraine (analysis of the Period 1975-1999)”. Ukrainian Neurosurgical Journal, no. 3, pp. 23-28, https://theunj.org/article/view/56184.