Samadov Aziz, Samadova Malika, and Aziza Kasimova. “Justifying the Use of Lightening Drilling Mixtures Used in Drilling Low Pressure Formations”. Eurasian Journal of Engineering and Technology, vol. 10, Oct. 2022, pp. 125-7, https://geniusjournals.org/index.php/ejet/article/view/2263.