@article{AL_1968_7_1_a5,
     author = {A. I. Kokorin and G. T. Kozlov},
     title = {Extended elementary and universal theories of lattice-ordered},
     journal = {Algebra i logika},
     pages = {91--103},
     publisher = {mathdoc},
     volume = {7},
     number = {1},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1968_7_1_a5/}
}