Raufov Azizbek Anvar o’g’li, and Jonqobilov Mirjalol. “IDEAS FOR THE CONSTRUCTION OF CHARACTERISTIC-GRID METHODS AND THE ANALYSIS OF DIFFERENTIAL SCHEMES IN THE SPACE OF INDETERMINATE COEFFICIENTS”. Galaxy International Interdisciplinary Research Journal, vol. 10, no. 4, Apr. 2022, pp. 511-4, https://internationaljournals.co.in/index.php/giirj/article/view/1728.