@article{ZNSL_1975_49_a0,
     author = {N. K. Kossovski},
     title = {On the expressive power of the operations of bounded summation and bounded multiplication},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {3--6},
     publisher = {mathdoc},
     volume = {49},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1975_49_a0/}
}