Borowik, Joanna Urszula, et al. “Pseudohemangioma of the Head - Diagnostic Difficulties in a Pediatric Patient With Ewing’s Sarcoma of the Scalp: Case Report”. Journal of Education, Health and Sport, vol. 9, no. 9, Sept. 2019, pp. 513-25, https://apcz.umk.pl/JEHS/article/view/7455.