Formation of hierarchical object concept using hierarchical latent Dirichlet allocation. - Yoshiki Ando; Tomoaki Nakamura; Takaya Araki; Takayuki Nagai (IROS, 2013)

Concept formation by robots using an infinite mixture of models. - Tomoaki Nakamura; Yoshiki Ando; Takayuki Nagai; Masahide Kaneko (IROS, 2015)