@inproceedings{Seidl85quadratic, author = {Helmut Seidl}, title = {A quadratic regularity test for non-deleting macro {S} grammars}, booktitle = {Fundamentals of Computation Theory}, editor = {Lothar Budach}, month = {September}, year = 1985, pages = {422-430}, series = {Lecture Notes in Computer Science}, volume = {199}, publisher = {Springer}, address = {Cottbus, Germany}, }