On a solution of an optimization problem in linear control systems with quadratic performance index Nguyen Canh — 1973 Kybernetika
A convergence theorem on the iterative solution of nonlinear two-point boundary-value systems Nguyen Canh — 1974 Kybernetika
An approximative method for solving the non-linear optimal control problem Nguyen Canh; Antonín Tuzar — 1975 Kybernetika