1. An overview of hydraulic fracturing;Veatch,1989
2. Formation of vertical fractures by means of highly viscous liquid;Khristianovich,1955
3. Widths of hydraulic fractures;Perkins;J. Petrol. Techn.,1961
4. Rapid method of predicting width and extent of hydraulically induced fractures;Geertsma;J. Petrol. Techn.,1969
5. Propagation of a vertical hydraulic fracture;Nordgren;Soc. Petrol Engrs. J.,1972