Nasirov R.N., Baimukhasheva G.K., и Solodovnikov S.P. 2019. «SEPARATE DETERMINATION OF THE AMOUNT OF OIL EXTRACTED BY ONE WELL FROM TWO LAYERS». Известия НАН РК. Серия химии и технологии, вып. 5 (октябрь):108-12. http://189185.vm7pq.group/chemistry-technology/article/view/1499.