@article{AA_1989_1_6_a0,
     author = {Yu. I. Lyubarskii},
     title = {Properties of systems of linear combinations of powers},
     journal = {Algebra i analiz},
     pages = {1--69},
     year = {1989},
     volume = {1},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_1989_1_6_a0/}
}