Czakon D, Michna NA, Sosnowski L , editors. On the Difficult Academic and Personal Relationship of Roman Ingarden and Kazimierz Twardowski . 63. In: Roman Ingarden and His Times [Internet]. Poland: Księgarnia Akademicka Publishing; 2020 [cited 2025 Jun. 30]. Available from: https://books.akademicka.pl/publishing/catalog/book/83/chapter/1060