This article is cited in 1 paper

Mathematical Events in the USSR

Il'ya Nestorovich Vekua (on his sixtieth birthday)

I. I. Danilyuk, N. I. Muskhelishvili, I. G. Petrovskii


MSC: 01A70, 35J55, 45Exx, 45B05

 English version: Russian Mathematical Surveys, 1967, 22:5, 169–179

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