On exact values of quasiwidths for some classes of differentiable periodic functions of two variables
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1926 ◽
Vol 5
(1-4)
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pp. 201-236
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2013 ◽
Vol 64
(8)
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pp. 1260-1276
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1994 ◽
Vol 09
(27)
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pp. 2515-2526
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