Laveleye, Emile de (1822–1892)
Janet, Paul (1823–1899)
Bunge, Gustav von (1844–1920)
Jacques, Amédée Florent (1813–1865) Saisset, Émile Edmond Simon, Jules (1814–1896)
Twardowski, Kazimierz (1866–1938)
Bruno Giordano.
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