@article{RM_1970_25_6_a17,
     author = {I. P. Egorov and A. T. Kondrat'ev and N. S. Lipatov},
     title = {Eleventh {Scientific} {Conference} of {Mathematical} {Departments} of {Volga} {Zone}},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     year = {1970},
     volume = {25},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1970_25_6_a17/}
}