@ARTICLE{DasTur_j2010, author = {J{\"u}rgen~Dassow and Sherzod~Turaev}, title = {{P}etri Net Controlled Grammars with a Bounded Number of Additional Places}, journal = actacybern, year = 2010, volume = 19, number = 3, pages = {609--634}, url = {http://www.inf.u-szeged.hu/actacybernetica/edb/vol19n3/pdf/Dassow_2010_ActaCybernetica.pdf} }