1. The Effect of Restricted Fluid Entry on Well Productivity
2. Aquifer Tests on Partially Penetrating Wells
3. L. Huisman, 1972 . Ground water recovery . Winchester Press, New York, p.131 .
4. A. Visocky, and Wm. C. Walton, 1970 . Values of W (u, r/m, gamma) presented in Groundwater Resources Evaluation , McGraw-Hill Book Co., New York, Table 3.3, p.140 .