RBF×SOM: An Efficient Algorithm for Large-Scale Multi-System Learning. - Takashi Ohkubo; Kazuhiro Tokunaga; Tetsuo Furukawa (IEICE Trans. Inf. Syst., 2009)

Requirements for the Learning of Multiple Dynamics. - Takashi Ohkubo; Tetsuo Furukawa; Kazuhiro Tokunaga (WSOM, 2011)

Research on multi-system learning theory: A case study of Brain-Inspired System research. - Tetsuo Furukawa; Kiyohisa Natsume; Takashi Ohkubo (SCIS&ISIS, 2012)