On approximation of integrable functions by modified Bernstein polynomials. Singh, Suresh Prasad — 1987 Publications de l'Institut Mathématique. Nouvelle Série
On the Degre of L1-aproximation by Modified Bernstein Polynomials Suresh Prasad Singh; O.P. Varshney; Govind Prasad — 1983 Publications de l'Institut Mathématique