Grelland, Hans. “Phenomenology and Physics. Hermann Weyl (1885-1955) . 127”. In Roman Ingarden and His Times, edited by Dominika Czakon, Natalia Anna Michna, and Leszek Sosnowski. Poland: Księgarnia Akademicka Publishing, 2020. Accessed January 2, 2026. https://books.akademicka.pl/publishing/catalog/book/83/chapter/1064.