Klafkowski, Alfons. “The Forms of Recognition of State Borders After World War II (With Particular Focus on the Arrangements Pertaining to the Polish-German Border)”. Przegląd Prawniczy Uniwersytetu Im. Adam Mickiewicza, vol. 12, June 2021, pp. 33-65, doi:10.14746/ppuam.2021.12.02.