1. C.R. Fast, G.B. Holman and R.J. Covlin, “A Study of the Application of MHF to the Tight Muddy “J” Formation Wattenberg Field, Adams and Weld Counties, Colorado,” Paper No. SPE 6524, 50th Annual Fall Meeting of the Society of Petroleum Engineers, Dallas Texas, Sept. 28–Oct. 1, 1975.
2. E.R. Simonson, A.S. Abou-Sayed and R.J. Clifton, “Containment of Massive Hydraulic Fractures,” Paper No. SPE 6089, 51st Annual Fall Technical Conference and Exhibition, New Orleans, Oct. 1976.
3. M.P. Cleary, “Primary Factors Governing Hydraulic Fractures in Heterogeneous Strati cified Porous Formations,” Paper No. 78-Pet-47, ASME Energy Technology Conference and Exhibition, Houston, Texas, November 1978.
4. U. Ahmed, A.S. Abou-Sayed and A.H. Jones, “Experimental Evaluation of Fracturing Fluid Interaction with Tight Reservoir Rocks and Propped Fractures,” Paper No. SPE 7922, SPE/DOE Symposium on Low-Permeability Gas Reservoirs, Denver, Colorado, May 20–22, 1979.
5. W.J. McGuire and V.J. Sikora, “The Effect of Vertical Fractures on Well Productivity,” Trans. AIME Vol. 219, pp. 401–403, 1960.