Alexei B. Gaina, Some fogotten relativists, Marcel Grossman Meeting on General relativity and Gravitation 15, Roma, 2018 [1]Arhivat în , la Wayback Machine.
Alexei B. Gaina, Some fogotten relativists, Marcel Grossman Meeting on General relativity and Gravitation 15, Roma, 2018 [1]Arhivat în , la Wayback Machine.
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