Sarah A. AL-Ameedee, J. Obaid, A., Zeyad Kadhim Jabber, Fouad Abdualameer Salman and Awatif Ibrahim Mohammed Alhaddad 2022. K-functional for Neural Networks and r-th Smoothness Moduli. Central Asian Journal of Theoretical and Applied Science. 3, 5 (Jun. 2022), 537–540.