Alex Fukunaga and Toshihiko Yanase and Hitoshi Iba,
"Goal Selection for a Busy Robot Tour Guide", 第 27 回日本ロボット学会学術講演会予講集, 3G1-02, 2009.
Akio Watanabe and Makoto Tanji and Hitoshi Iba,
"Creating Singing Vocal Expressions by means of Interactive Evolutionary Computation", the 5th International Workshop on Computational Inteligence & Applications, 2009, pp. 278-283.
Toshihiko Yanase and Yoshihiko Hasegawa and Hitoshi Iba,
"Binary Encoding for Prototype Tree of Probabilistic Model Building GP", Proceedings of 2009 Genetic and Evolutionary Computation Conference (GECCO2009), 2009, pp. 1147-1154.
Makoto Tanji and Hitoshi Iba,
"Program Optimization by Random Tree Sampling", Proceedings of 2009 Genetic and Evolutionary Computation Conference (GECCO2009), 2009.
Claus Aranha and Hitoshi Iba,
"The Memetic Tree-based Genetic Algorithm and its Application to Portfolio Optimization", Memetic Computing, Volume 1, Issue 2, 2009.
Akinori Hirabayashi and Claus Aranha and Hitoshi Iba,
"Optimization of the Trading Rule in Foreign Exchange using Genetic Algorithms", Proceedings of the 2009 IASTED International Conference on Advances in Computer Science and Engineering (ACSE2009), Phuket, Thailand, 2009.