Gabdrakhmanova, C., F. Usmanova, and G. Khramov. “A Probabilistic and Statistical Approach As a Means of Predicting the Efficiency of Hydraulic Fracturing”. Eastern-European Journal of Enterprise Technologies, vol. 3, no. 8(81), June 2016, pp. 30-36, doi:10.15587/1729-4061.2016.72537.