@article{ZNSL_1968_8_a8,
     author = {N. K. Kossovski},
     title = {A~construction of basic operators of the combination theory of $K$-algorithms, using operators of a~simple kind},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {80--94},
     publisher = {mathdoc},
     volume = {8},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1968_8_a8/}
}