@article{AL_1989_28_6_a2,
     author = {Yu. L. Ershov},
     title = {A problem of {Jarden-Shelah}},
     journal = {Algebra i logika},
     pages = {640--642},
     year = {1989},
     volume = {28},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1989_28_6_a2/}
}