@inproceedings{DasLan_j1991, author = {J{\"u}rgen~Dassow and Klaus-J{\"o}rn~Lange}, title = {Computational complexity and hardest languages of automata with abstract storages}, booktitle = {Proc. Fundamentals of Computation Theory '91}, series = {LNCS}, volume = 529, publisher = {Springer-Verlag}, year = 1991, editor = {Lothar~Budach}, pages = {200--209} }