@article{MAIS_2015_22_2_a2,
     author = {Michael Dekhtyar and Boris Karlov},
     title = {PDA with independent counters},
     journal = {Modelirovanie i analiz informacionnyh sistem},
     pages = {176--196},
     publisher = {mathdoc},
     volume = {22},
     number = {2},
     year = {2015},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MAIS_2015_22_2_a2/}
}