Jurayev Shaxzod Shuxratjonvich. “THE DEFINITION OF THE DEFINITE INTEGRAL IN TERMS OF DARBOUX SUMS AND THE CONDITIONS FOR INTEGRABILITY”. International Multidisciplinary Journal for Research & Development, vol. 13, no. 4, Apr. 2026, pp. 1995-00, https://ijmrd.in/index.php/imjrd/article/view/5984.