@techreport{Lehmann2013, author = {Felix Lehmann}, title = {Inexaktheit in Newton-Lagrange-Verfahren f{\"u}r Optimierungsprobleme mit Elliptischen PDGL-Nebenbedingungen}, institution = {ZIB}, address = {Takustr. 7, 14195 Berlin}, number = {13-37}, language = {deu}, year = {2013} }