@article{AL_1989_28_1_a4,
     author = {K. Zh. Kudaibergenov},
     title = {Extensions of homogeneous models},
     journal = {Algebra i logika},
     pages = {61--74},
     year = {1989},
     volume = {28},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1989_28_1_a4/}
}