@article{DM_1992_4_1_a6,
     author = {F. N. Sokhatskii},
     title = {On the associativity of multiplace operations},
     journal = {Diskretnaya Matematika},
     pages = {66--84},
     publisher = {mathdoc},
     volume = {4},
     number = {1},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DM_1992_4_1_a6/}
}