Configuration flatness of Lagrangian control systems with fewer controls than degrees of freedom. - Kazuhiro Sato; Toshihiro Iwai (Syst. Control. Lett., 2012)

A complex singular value decomposition algorithm based on the Riemannian Newton method. - Hiroyuki Sato; Toshihiro Iwai (CDC, 2013)

A Riemannian Optimization Approach to the Matrix Singular Value Decomposition. - Hiroyuki Sato; Toshihiro Iwai (SIAM J. Optim., 2013)