@Article{MitSti_j2001, author = {Victor~Mitrana and Ralf~Stiebe}, title = {Extended Finite Automata over Groups}, journal = dam, year = 2001, volume = {108}, pages = {287--300}, url = {http://www.sciencedirect.com/science?_ob=MImg&_imagekey=B6TYW-4234B2S-J-DJ&_cdi=5629&_user=1908389&_orig=search&_coverDate=03%2F15%2F2001&_sk=998919996&view=c&wchp=dGLbVlb-zSkWW&md5=c049d423b434125796b9b3f1567498d9&ie=/sdarticle.pdf} }