Rockafellar, R. T.
Variational Analysis - Berlin Springer 2009 - xii, 734p. - A series of comprehensive studies in Mathematics no. 317 .
978-3-540-62772-2
Variational Analysis - Berlin Springer 2009 - xii, 734p. - A series of comprehensive studies in Mathematics no. 317 .
978-3-540-62772-2