@Article{FerSti_j2008, author = {Henning~Fernau and Ralf~Stiebe}, title = {Blind Counter Automata on $\omega$-Words}, journal = fundinform, year = {2008}, volume = 83, number = {1--2}, pages = {51--64}, url = {http://iospress.metapress.com/content/rq08p461xn0ll138/fulltext.pdf} } %http://fi.mimuw.edu.pl/abs83.html#5