@article{AA_1991_3_5_a0,
     author = {V. M. Babich},
     title = {Hadamard's ansatz, its analogues, generalizations and applications},
     journal = {Algebra i analiz},
     pages = {1--37},
     publisher = {mathdoc},
     volume = {3},
     number = {5},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AA_1991_3_5_a0/}
}