Roszkowska, A., T. K. Bąk, J. Wojciechowicz, A. Gawęda, and T. Tomaszewski. “Fungal Rhinosinusitis in Patient With Multiple Myeloma – Case Report”. Journal of Education, Health and Sport, vol. 8, no. 2, Feb. 2018, pp. 95-105, https://apcz.umk.pl/JEHS/article/view/5265.