Koleva, Maya, et al. “Neurofibromatosis Type I – Review of the Clinical-Genetic, Diagnostic and Therapeutic Aspects and Analysis of a Bulgarian Pediatric Population of 40 Children. Рart I. : Сlinical-Genetic, Diagnostic and Therapeutic Studies”. Bulgarian Neurology, vol. 21, no. 2, Oct. 2020, pp. 57-62, https://www.nevrologiabg.com/journal/index.php/neurology/article/view/35.