@Inproceedings{EPTCS3.6, author = {Belli, Fevzi and Beyazit, Mutlu}, year = {2009}, title = {Mutation of Directed Graphs -- Corresponding Regular Expressions and Complexity of Their Generation}, editor = {Dassow, J\"urgen and Pighizzini, Giovanni and Truthe, Bianca}, booktitle = {{\rm Proceedings Eleventh International Workshop on} Descriptional Complexity of Formal Systems, {\rm Magdeburg, Germany, July 6-9, 2009}}, series = {Electronic Proceedings in Theoretical Computer Science}, volume = {3}, publisher = {Open Publishing Association}, pages = {69-77}, doi = {10.4204/EPTCS.3.6}, }