1. A Comparison of the Theories for Predicting Width and Extent of Vertical Hydraulically Induced Fractures
2. Howard G.andFast C.R.(1957).Optimum fluid characteristics for fracture extension.Proceedings of the American Petroleum Institute261–270. https://doi.org/API‐57‐261.
3. Mechanics of hydraulic fracturing;Hubbert M.K.;Society of Petroleum Engineers,1957