Haitov, B. T., R. V. . Aliqulov, and S. A. . Xolmurodova. “Production of Modified Portland Cement With Additions and Production of Special Concrete”. International Journal of Innovative Analyses and Emerging Technology, vol. 1, no. 6, Nov. 2021, pp. 187-91, https://openaccessjournals.eu/index.php/ijiaet/article/view/692.