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The degree of internationalization and firm productivity : empirical evidence from large multinationals
Tsionas, Efthymios G., (2022)
Non-linearities and chaos : the case of the Greek economy
Tsionas, Efthymios G., (1991)
Clustering and meta-envelopment in data envelopment analysis
Tsionas, Efthymios G., (2023)