@techreport{LangWalter1992, author = {Jens Lang and Artur Walter}, title = {A Finite Element Method Adaptive in Space and Time for Nonlinear Reaction-Diffusion- Systems.}, institution = {ZIB}, address = {Takustr. 7, 14195 Berlin}, number = {SC-92-05}, language = {eng}, year = {1992} }