@article{AL_2002_41_2_a7,
     author = {A. I. Stukachev},
     title = {$\Sigma${-Admissible} {Families} over {Linear} {Orders}},
     journal = {Algebra i logika},
     pages = {228--252},
     publisher = {mathdoc},
     volume = {41},
     number = {2},
     year = {2002},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2002_41_2_a7/}
}