@article{AL_2019_58_2_a7,
     author = {I. K. Sharankhaev},
     title = {Repetition-free functions of the algebra of logic in pre-elementary
},
     journal = {Algebra i logika},
     pages = {271--284},
     publisher = {mathdoc},
     volume = {58},
     number = {2},
     year = {2019},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2019_58_2_a7/}
}