@article{AL_1989_28_5_a8,
     author = {A. G. Pinus},
     title = {Countable skeletons of embeddability of discriminator},
     journal = {Algebra i logika},
     pages = {597--607},
     year = {1989},
     volume = {28},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1989_28_5_a8/}
}