Wygnańska, J. From PPR to Systemic Transformation. In Telling the Great Change: The Process of the Systemic Transformation in Poland in Biographical Perspective; Kaźmierska, K., Waniek, K., Eds.; Lodz University Press: Poland, 2020; pp. 103-113. https://doi.org/10.18778/8142-455-4.06.