1. On Sommerfeld's radiation condition;Atkinson;Phil. Mag. Series,1949
2. A generalization of theorems of Rellich and Atkinson;Wilcox,1956
3. An expansion theorem for electromagnetic fields;Wilcox;C.P.A.M.,1956
4. Radiation patterns and radiation fields;Miiller;J. Rat. Mech. Anal.,1955
5. Integral Equation Methods in Scattering Theory;Colton,1983