@article{MZM_2001_69_6_a9,
     author = {V. A. Smirnov},
     title = {A {Degeneracy} {Criterion} for $A_\infty${-Structures}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {906--911},
     year = {2001},
     volume = {69},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2001_69_6_a9/}
}