@inproceedings{Das_j1981_b, author = {J{\"u}rgen~Dassow}, title = {Equality languages and language families}, booktitle = {Proc. Fundamentals of Computation Theory '81}, series = {LNCS}, volume = 118, publisher = {Springer-Verlag}, year = 1981, editor = {B\'ela~Csakany and J\'anos~Demetrovics}, pages = {100-109} }