Sadullayev Azizbek Nasillo o‘g‘li. “COMPUTER MODELING OF SHELL-TUBE HEAT EXCHANGER DEVICE IN OIL REFINING TECHNOLOGICAL SYSTEM”. Ethiopian International Journal of Multidisciplinary Research, vol. 10, no. 11, Nov. 2023, pp. 338-43, https://www.eijmr.org/index.php/eijmr/article/view/516.