@techreport{GoetschelMinion2019, author = {Sebastian G{\"o}tschel and Michael L. Minion}, title = {An Efficient Parallel-in-Time Method for Optimization with Parabolic PDEs}, institution = {ZIB}, address = {Takustr. 7, 14195 Berlin}, number = {19-04}, language = {eng}, year = {2019} }