1. Bernstein-type operators diminish the φ-variation;Adell;Constr. Approx.,1996
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4. Approximation in variation by homothetic operators in multidimensional setting;Angeloni;Differential Integral Equations,2013
5. Convergence and rate of approximation in BVφ(R+N) for a class of Mellin integral operators;Angeloni;Atti Accad. Naz. Lincei Rend. Lincei Mat. Appl.,2014