Nonsystematic M-Ary Asymmetric Error Correcting Codes Designed by Multilevel Coding Method. - Haruhiko Kaneko; Mariko Numakami; Eiji Fujiwara (PRDC, 2004)

Maxwell Normal Distribution in a Manifold and Mahalanobis Metric. - Yukihiko Yamashita; Mariko Numakami; Naoya Inoue (SSPR/SPR, 2006)