1. : Proceedings of the 9th International Conference on General Relativity and Gravitation, Deutscher Verlag der Wissenschaften Berlin 1983 (ed. );
2. Unified Field Theories of more than 4 Dimensions – including Exact Solutions, World Scientific Singapore 1983 (eds. and );
3. Spinor matter in a particular 5-dimensional projective unified field theory
4. Galaxies, Axisymmetric Systems and Relativity, Cambridge: University Press 1985 (ed. );
5. Gravitation and Geometry, Bibliopolis Naples 1987 (eds. W. RINDLER and A. TRAUTMAN).