@ARTICLE{DasMit_j1996_b, author = {J{\"u}rgen~Dassow and Victor~Mitrana}, title = {Fairness in grammar systems}, journal = actacybern, year = 1996, volume = 12, number = 4, pages = {331--345}, url = {http://www.inf.u-szeged.hu/actacybernetica/vol12n4/mitrana/mitrana.xml} }