Antunes de Oliveira, V., M. A. Rojas Medar, and Vieira Brandão A. J. “A Note on Kkt-Invexity in Nonsmooth Continuous-Time Optimization”. Proyecciones (Antofagasta, On Line), vol. 26, no. 3, Apr. 2017, pp. 269-7, doi:10.4067/S0716-09172007000300005.