Czakon, D., Michna, N. A., & Sosnowski, L. (Red.). (2020). On the Difficult Academic and Personal Relationship of Roman Ingarden and Kazimierz Twardowski .......... 63. W Roman Ingarden and His Times. Wydawnictwo Księgarnia Akademicka. https://doi.org/10.12797/9788381382106.04