@article{TIMM_2010_16_4_a20,
     author = {E. D. Livshits},
     title = {Realizability of greedy algorithms},
     journal = {Trudy Instituta matematiki i mehaniki},
     pages = {228--236},
     year = {2010},
     volume = {16},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TIMM_2010_16_4_a20/}
}