Dilafruz Kuchkorova. “Monopoly Behaviour of the DeBeers Diamond Company”. NAZARIY VA AMALIY FANLARDAGI USTUVOR ISLOHOTLAR VA ZAMONAVIY TA’LIMNING INNOVATSION YO’NALISHLARI, vol. 1, no. 7, July 2024, pp. 30-33, https://innovativepublication.uz/index.php/NUZY/article/view/1638.