1. Coradeschi S, Saffiotti A (2003) An introduction to the anchoring problem. Robotics and Autonomous Systems 43:85–96
2. Drumwright E, Ng-Thow-Hing V, Matarić M J (2006) Toward a vocabulary of primitive task programs for humanoid robots. In: Proc International Conference on Development and Learning (ICDL), Bloomington, IN
3. Yokota M (2005) An approach to integrated spatial language understanding based on mental image directed semantic theory. In: Proceedings of 5th Workshop on Language and Space, Bremen, Germany, Oct., 2005
4. Yokota M, Capi G (2005) Cross-media operations between text and picture based on mental image directed semantic theory. WSEAS Trans Information Science Applications 10(2):1541–1550
5. Yokota M (2006) Towards a universal knowledge representation language for ubiquitous intelligence based on mental image directed semantic theory. In: Ma J, et al. (eds) Ubiquitous Intelligence and Computing 2006 (UIC 2006), LNCS 4159, pp 1124–1133