Grouping complex face parts by nonlinear oscillations. - Souichi Oka; Miki Kitabata; Yoshiaki Ajioka; Yoshiyasu Takefuji (ESANN, 1998)

The evaluation of new self-organization classification algorithms using magnetic resonance images. - Souichi Oka; Yoshiyasu Takefuji (CATA, 2001)

Letter to the Editor: Complementary statistical approaches for interpreting machine learning feature importance in osteoporosis risk. - Souichi Oka; Takuma Yamazaki; Yoshiyasu Takefuji (Comput. Biol. Medicine, 2025)