1. Fundamentals of reservoir engineering, volume 8;Dake,1978
2. Determination of average reservoir pressure from build-up surveys;Dietz;J. Pet. Technol.,1965
3. Pressure distributions in rectangular reservoirs;Earlougher;J. Pet. Technol.,1968
4. A method for determination of average pressure in a bounded reservoir;Matthews;Trans. AIME,1954
5. New shape factors for wells produced at constant pressure;Helmy,1998