Oybek Oripov1*, Gavhar Narmayeva1, Jamoliddin Kuljonov1, Muqaddas Abdushukurova2. “EXPERIMENTAL STUDY AND ANALYSIS ON THE EFFECT OF M40 CONCRETE ON THE DURABILITY STRENGTH PROPERTIES WITH PARTIAL REPLACEMENT OF SAND WITH COPPER SLAG”. Spectrum Journal of Innovation, Reforms and Development, vol. 11, Jan. 2023, pp. 144-55, https://sjird.journalspark.org/index.php/sjird/article/view/527.