1. Linear Transport Theory;Case,1967
2. An Introduction to Transport Theory;Wing,1962
3. Mixed Boundary Value Problems in Potential Theory;Sneddon,1966
4. Boundary Value Problems of Mathematical Physics;Stakgold,1967
5. A Griggiths crack problem for a nonhomogeneous medium;Gerasoulis;Internat. J. Engrg. Sci.,1980