@article{DAN_1986_289_6_a4,
     author = {A. V. Mikhalev},
     title = {Orthogonally complete many-sorted algebraic systems},
     journal = {Doklady Akademii Nauk},
     pages = {1304--1308},
     publisher = {mathdoc},
     volume = {289},
     number = {6},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1986_289_6_a4/}
}