- Adamson, Robert@ (2)
- Ajdukiewicz, Kazimierz@ (1)
- Ayer, Alfred Jules@ (4)
- Brouwer, L.E.J.@ (3)
- Chwistek, Leon@ (1)
- Cocchiarella, Nino@ (1)
- Davidson, Donald@ (3)
- Dummett, Michael@ (4)
- Frege, Gottlob@ (8)
- Goodman, Nelson@ (3)
- Husserl, Edmund@ (20)
- Kotarbinski, Tadeusz@ (1)
- Lesniewski, Stanislaw@ (1)
- Mally, Ernst@ (2)
- Meinong, Alexius@ (2)
- Popper, Karl@ (18)
- Prior, Arthur Norman@ (1)
- Russell, Bertrand@ (20)
