Kovács I., G. and Takács, Árpád 2020. The Atypical Family Tree and Family History of János Ángyán, Ordinary Full Professor of Internal Medicine at the Faculty of Medicine at the Royal Hungarian Erzsébet University . Per Aspera ad Astra. 7, 2 (Dec. 2020), 123–139. DOI:https://doi.org/10.15170/PAAA.2020.07.02.07 .