Ivanov, Y., Patrikov, K., Slavchev, S., & Andreev, A. (2023). Our Experience with the Modular Universal Tumour and Revision System in Pediatric Patients with Ewing’s Sarcoma – Report of Six Cases. Proceedings of the Bulgarian Academy of Sciences, 76(2), 302–308. https://doi.org/10.7546/CRABS.2023.02.15