Characterization of Extremal Controls for Infinite Dimensional Time-Varying Systems. - Diomedes Barcenas; Hugo Leiva (SIAM J. Control. Optim., 2001)

A broad class of evolution equations are approximately controllable, but never exactly controllable. - Diomedes Barcenas; Hugo Leiva; Zoraida Sívoli (IMA J. Math. Control. Inf., 2005)

Controllability of the Ornstein-Uhlenbeck equation. - Diomedes Barcenas; Hugo Leiva; Wilfredo Urbina (IMA J. Math. Control. Inf., 2006)

Controllability of Laguerre and Jacobi equations. - Diomedes Barcenas; Hugo Leiva; Yamilet Quintana; Wilfredo Urbina (Int. J. Control, 2007)