Discriminative efficiency methodology for validating software quality classification models. - Ryouei Takahashi; Hirofumi Wakayama (Syst. Comput. Jpn., 1995)

The effect of interface complexity on program error density. - Ryouei Takahashi; Yukihiro Nakamura (ICSM, 1996)

Building software quality classification trees: approach, experimentation, evaluation. - Ryouei Takahashi; Yoichi Muraoka; Yukihiro Nakamura (ISSRE, 1997)

Software quality classification model based on McCabe's complexity measure. - Ryouei Takahashi (J. Syst. Softw., 1997)

Solving the traveling salesman problem through genetic algorithms with changing crossover operators. - Ryouei Takahashi (ICMLA, 2005)

A Methodology of Extended Changing Crossover Operators to Solve the Traveling Salesman Problem. - Ryouei Takahashi (ICNC (1), 2008)

A Hybrid Method of Genetic Algorithms and Ant Colony Optimization to Solve the Traveling Salesman Problem. - Ryouei Takahashi (ICMLA, 2009)

Solving the Traveling Salesman Problem through Iterative Extended Changing Crossover Operators. - Ryouei Takahashi (ICMLA (1), 2011)

Quantitative evaluation of iterative extended changing crossover operators to solve the traveling salesman problem: Diversity measurement and its application to selection strategies in genetic algorithms. - Ryouei Takahashi (ICNC, 2014)

Verification of thermo-dynamical genetic algorithm to solve the function optimization problem through diversity measurement - Diversity measurement and its application to selection strategies in genetic algorithms. - Ryouei Takahashi (CEC, 2016)

Empirical evaluation of changing crossover operators to solve function optimization problems. - Ryouei Takahashi (SSCI, 2016)

Ant Colony Optimization with Stepwise Localization of the Discrete Search Space to Solve Function Optimization Problems. - Ryouei Takahashi; Yukihiro Nakamura (ICMLA, 2017)

Experimental Evaluation of ACO for Continuous Domains to Solve Function Optimization Problems. - Ryouei Takahashi; Yukihiro Nakamura; Toshihide Ibaraki (ANTS Conference, 2018)