Acu A-M, Gonska H, Ra¸sa I. Grüss-type and Ostrowski-type inequalities in approximation theory. Ukr. Mat. Zhurn. [Internet]. 2011 Jun. 25 [cited 2025 Dec. 5];63(6):723-40. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/2758