Minimal time function with respect to a set of directions: basic properties and applications. - Marius Durea; Marian Pantiruc; Radu Strugariu (Optim. Methods Softw., 2016)

A New Type of Directional Regularity for Mappings and Applications to Optimization. - Marius Durea; Marian Pantiruc; Radu Strugariu (SIAM J. Optim., 2017)