KARAZON, Abdel Hadi Mohamed; AMER, Mohamed Mahmoud. (On Summability Of Double Fourier Series By (N,p,q,p ́,q ́ )(E,1,1. Journal of natural sciences, life and applied sciences, New Mexico, United States, v. 2, n. 4, p. 40–25, 2018. DOI: 10.26389/AJSRP.A250718. Disponível em: https://ajsrp.ojsexpert.com/index.php/jnslas/article/view/992. Acesso em: 20 dec. 2025.