-  Yasuo Namioka, Akira Masuda, and Takuya Maekawa, "Unconstrained Person Identification from Ceiling Using Multiview Learning for Tabletop Users," Journal of Information Processing (JIP), volume 58, number 10, pages 889-900 October 2017.
-  Takuya Maekawa, Akira Masuda, and Yasuo Namioka, " Identification from Ceiling: Unconstrained Person Identification for Tabletops Using Multiview Learning," Proc. of International Conference on Mobile and Ubiquitous Multimedia (MUM 2016), pages 273-284 December 2016.
-  Akira Masuda, Takuya Maekawa, and Yasuo Namioka, "Preliminary Investigation of Unconstrained Person Identification for Tabletops Using Soft Biometrics," Proc. of IEEE Intl Conf. on Pervasive Computing and Communications (PerCom 2016), March 2016.