Helmut Gfrerer,
"On Directional Metric Regularity, Subregularity and Optimality Conditions for Nonsmooth Mathematical Programs"
, Serie NuMa Report, Nummer 2012-04, Eigenverlag, Linz, 2-2012
Original Titel:
On Directional Metric Regularity, Subregularity and Optimality Conditions for Nonsmooth Mathematical Programs