1. ‘Approximate solutions to scattering problems by multipole matching’, Ohio State University Research Foundation, Antenna Laboratory, Columbus, Ohio, USA, 1959
2. ‘Multipole field expansions and their use in approximate solutions ot electromagnetic scattering problems’, Ohio State University Research Foundation, Antenna Laboratory, Columbus, Ohio, USA, 1959
3. ‘The scattering of electromagnetic waves by perfectly reflecting objects of complex shape’, Purdue University, Lafayette, Ind., USA, 1963