@article{ZNSL_1968_8_a5,
     author = {A. G. Dragalin},
     title = {Word operator algorithms},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {46--52},
     publisher = {mathdoc},
     volume = {8},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1968_8_a5/}
}