The Collatz Problem in a New Perspective: Energy Consumption Analysis. - Kostas Zotos; Andreas Litke; George Stephanides; Alexander Chatzigeorgiou (SoMeT, 2005)

Analysis of Object-Oriented Numerical Libraries. - Kostas Zotos; George Stephanides (Software Engineering Research and Practice, 2006)

Numerical Software Difficulties. - Kostas Zotos (Software Engineering Research and Practice, 2007)

Performance comparison of Maple and Mathematica. - Kostas Zotos (Appl. Math. Comput., 2007)

Object-oriented design principles in mathematics. - Kostas Zotos (Appl. Math. Comput., 2007)

Object-oriented programming in Mathematics. - Kostas Zotos (Appl. Math. Comput., 2007)

Improving numerical software. - Kostas Zotos (Appl. Math. Comput., 2007)

Computer Algebra Systems - New strategies and techniques. - Kostas Zotos (Appl. Math. Comput., 2008)