1. Barenblatt, G.E., Zheltov, I.P. and Kochina, I.N. (1960) Basic Concepts in the Theory of Homogeneous Liquids. J. Applied Math, USSR, 24: 5, 1286–1303.
2. Duguid, J.O. and Lee, P.C.Y. (1977) Flow in Fractured Porous Media. Water Resources Res., 13: 3, 558–566.
3. Edwards, A.L. (1969) TRUMP: A Computer Program for Transient and Steady State Temperature Distributions in Multidimensional Systems. National Technical Information Service, Springfield, VA., 265.
4. Ergatoudis, I., Irons, B.M. and Zienkiewicz, O.C. (1968) Curved Isoparametric, “Quadrilateral” Elements for Finite Element Analysis. Int. J. Solids Structures, 4, 31–42.
5. Finlayson, B.A. and Scriven, L.E. (1967) On the Search for Variational Principles. Int. Jour. Heat Transfer, 10, 799–821.