Chojna, W. (2020) «Roman Ingarden and Edmund Husserl. Idealism, Identity, and Relativism . 43», в Czakon, D., Michna, N.A., и Sosnowski, L. (ред.) Roman Ingarden and His Times. Poland: Księgarnia Akademicka Publishing. doi:10.12797/9788381382106.03.