@article{Das_j2005_b, author = {J{\"u}rgen~Dassow}, title = {Contextual grammars with subregular choice}, journal = fundinform, volume = {64}, number = {1--4}, year = 2005, pages = {109--118}, url = {http://iospress.metapress.com/content/nmbrc0dtcx81xceu/fulltext.pdf} } %http://fi.mimuw.edu.pl/abs64.html#10