Kwartnik-Pruc, A., and A. Trembecka. “Analysis of the Implementation of Laws on the Transformation of the Right of Perpetual Usufruct into Ownership”. Acta Scientiarum Polonorum Administratio Locorum, vol. 18, no. 4, Dec. 2019, pp. 363-80, doi:10.31648/aspal.4318.