Kliuchka, V.M., Rozumenko, A.V., Rozumenko, V.D., Semenova, V.M. and Malysheva, T.A. 2018. Heterogeneity of oligoastrocytoma: morphology, surgery, and survival in the series of 163 patients. Retrospective study. Ukrainian Neurosurgical Journal. 3 (Sep. 2018), 24–33. DOI:https://doi.org/10.25305/unj.126654.