His works have been studied by critics in various countries of the world, such as Giuseppe Alpi (Italy), Lourdes Andreassi (Portugal), Albert Bagby Jr. (US), Abel Barros Baptista (Portugal), Hennio Morgan Birchal (Brazil), Edoardo Bizzarri (Italy), Jean-Michel Massa (France), Helen Caldwell (US), John Gledson (England), Adrien Delpech (France), Albert Dessau (Germany), Paul B. Dixon (US), Keith Ellis (US), Edith Fowke (Canada), Anatole France (France), Richard Graham (US), Pierre Hourcade (France), David Jackson (US), G. Reginald Daniel (US), Linda Murphy Kelley (US), John C. Kinnear, Alfred Mac Adam (US), Victor Orban (France), Daphne Patai (US), Houwens Post (Italy), Samuel Putnam (US), John Hyde Schmitt, Tony Tanner (England), Jack E. Tomlins (US), Carmelo Virgillo (US), Dieter Woll (Germany), August Willemsen (Netherlands) and Susan Sontag (US).