@article{FPM_2012_17_7_a9,
     author = {B. Plotkin and T. Plotkin},
     title = {Cascade connections and triangular products of linear automata},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {175--186},
     publisher = {mathdoc},
     volume = {17},
     number = {7},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2012_17_7_a9/}
}