- Author: Grigore T. Popa, Dumitru Radu Popa, Richard Constantinescu (Ed.)
- Language: Romanian
- Year: 2014
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- Language: Romanian
- Year: 2002
- Author: Grigore T. Popa, Dana Baran (Ed.)
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- Year: 2010
- Author: Grigore T. Popa, Dana Baran (Ed.)
- Language: Romanian
- Year: 2010
- Author: Grigore T. Popa
- Language: Romanian
- Year: 1945
- Author: T. B. Johnston, Grigore T. Popa
- Language: Romanian
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- Author: Grigore T. Popa
- Language: Romanian
- Year: 1945
- Author: Grigore T. Popa
- Language: Romanian
- Year: 1944