@article{MZM_1968_4_1_a9,
     author = {O. N. Matsedonskaya},
     title = {Neutral polyverbal operations},
     journal = {Matemati\v{c}eskie zametki},
     pages = {85--89},
     publisher = {mathdoc},
     volume = {4},
     number = {1},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1968_4_1_a9/}
}