Strengthening Weierstrass' condition. - Javier F. Rosenblueth; Gerardo Sánchez Licea (IMA J. Math. Control. Inf., 2004)

Reforzamientos de la condicion de Weierstrass y conjugacion en control optimo - Gerardo Sánchez Licea (2004)

A new sufficiency theorem for strong minima in the calculus of variations. - Javier F. Rosenblueth; Gerardo Sánchez Licea (Appl. Math. Lett., 2005)

Weakening the strengthened condition of Weierstrass for the isoperimetric problem in the calculus of variations. - Gerardo Sánchez Licea (IMA J. Math. Control. Inf., 2008)

Sufficiency by a direct method in the variable state problem of calculus of variations: singular extremals. - Gerardo Sánchez Licea (IMA J. Math. Control. Inf., 2009)

Singular Weak Optimal Controls. - Javier F. Rosenblueth; Gerardo Sánchez Licea (Control. Intell. Syst., 2012)

Sufficiency and singularity in optimal control. - Javier F. Rosenblueth; Gerardo Sánchez Licea (IMA J. Math. Control. Inf., 2013)

Relaxing Strengthened Legendre-Clebsch Condition. - Gerardo Sánchez Licea (SIAM J. Control. Optim., 2013)

Sufficiency for Purely Essentially Bounded Optimal Controls. - Gerardo Sánchez Licea (Symmetry, 2020)

A Straightforward Sufficiency Proof for a Nonparametric Problem of Bolza in the Calculus of Variations. - Gerardo Sánchez Licea (Axioms, 2022)

Sufficiency for Weak Minima in Optimal Control Subject to Mixed Constraints. - Gerardo Sánchez Licea (Symmetry, 2022)