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Found 6 Documents (Results 1–3)

Math. Notes 92, No. 2, 151-165 (2012); translation from Mat. Zametki 92, No. 2, 163-180 (2012).
MSC:  47N20 35Q40
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Math. Notes 81, No. 1, 28-36 (2007); translation from Mat. Zametki 81, No. 1, 32-42 (2006).
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