Mathematics: Queen and Servant of Science. E.T. Bell, American mathematician,1951
Chapters in Books
Looking at the Monetary Integration: Modelling Interest Rate Transmission Dynamics in Greece. Is there any Structural Break after EMU? Dionysios Chionis and Costas Leon. In the book Regionalisation, Growth and Economic Integration, Publisher: Physica-Verlag HD, 2007.
A Dynamic Correlation Approach of the Swiss Tourism Income. Costas Leon and Bruno Eeckels. Advances in Tourism Economics, Springer, 2011.
The Singular Spectrum Analysis in Time Series. Christina Beneki, Hossein Hassani, Costas Leon, Silva Emmanuel. Special volume dedicated to the 100 years of the Greek Mathematical Society, 2018.