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Found 29 Documents (Results 1–29)

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Math. USSR, Sb. 16, 245-263 (1972); translation from Mat. Sb., n. Ser. 87(129), 236-253 (1972).
MSC:  35K25 35A35
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Math. USSR, Sb. 16, 307-322 (1972); translation from Mat. Sb., n. Ser. 87(129), 293-308 (1972).
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Math. USSR, Sb. 16, 333-347 (1972); translation from Mat. Sb., n. Ser. 87(129), 324-337 (1972).
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