@article{VMUMM_2000_6_a15,
     author = {R. F. Safin},
     title = {On the depth and complexity of formulas in some classes of $k$-valued logic},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {65--68},
     publisher = {mathdoc},
     number = {6},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_2000_6_a15/}
}