([On Summability Of Double Fourier Series And It’s Conjugate By Double Nörlund in The Space L_2 ([0,π]×[0,π . JNSLAS [Internet]. 2019 Sep. 30 [cited 2024 Jul. 3];3(3):84-71. Available from: https://journals.ajsrp.com/index.php/jnslas/article/view/1742