Mathematical Programs with Complementarity Constraints in Function Space: C- and Strong Stationarity and a Path-Following Algorithm. - Michael Hintermüller; I. Kopacka (SIAM J. Optim., 2009)

A smooth penalty approach and a nonlinear multigrid algorithm for elliptic MPECs. - Michael Hintermüller; I. Kopacka (Comput. Optim. Appl., 2011)