1. On comonotone approximation;Beatson;Canad. Math. Bull.,1983
2. Constructive Approximation;DeVore,1993
3. On a constructive characteristic of functions, satisfying Lipschitz condition Lipα (0<α<1) on a finite intersept of a straight line;Dzyadyk;Izv. Akad. Nauk SSSR Ser. Math.,1956
4. Piecewise monotone pointwise approximation;Dzyubenko;Constr. Approx.,1998
5. Comonotone approximation;Gilewicz;Fund. Prikladnaya Math.,1996