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Found 4 Documents (Results 1–3)

Math. Notes 53, No. 6, 657-660 (1993); translation from Mat. Zametki 53, No. 6, 141-145 (1993).
Reviewer: P.Zabreiko (Minsk)
MSC:  35Q35 35C20 35J05
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Math. Notes 49, No. 4, 355-365 (1991); translation from Mat. Zametki 49, No. 4, 31-46 (1991).
MSC:  35L55 35B30 35L05
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