- Author: Prof. univ. C. Ionescu-Bujor Conf. univ. O. Sacter
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- Year: 1963
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- Year: 2019
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- Language: English
- Year: 2009
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- Language: English
- Year: 2012
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- Year: 2019
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- Year: 2019
- Author: Shouhei Honda
- Language: English
- Year: 2018
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- Language: English
- Year: 2017
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- Year: 2018