Degree of comonotone approximation of periodic functions von Dzyubenko, G. A., Дзюбенко, Г. А.

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Restrictions for order of q-monotone approximation of periodic functions von Dzyubenko, G. A., Дзюбенко, Г. А.

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Coconvex Pointwise Approximation von Dzyubenko, G.A., Gilewicz, J., Shevchuk, I.A.

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A cubic spline of tri-monotone approximation von Dzyubenko, G. A., Дзюбенко, Г. A., Дзюбенко, Г. A.

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