Fransworth, D., Fink, J., & Thompson. (1972). Methods of local and global differential geometry in general relativity: Proceedings of the Regional Conference on Relativity held at the University of Pittsburgh, Pittsburgh, Pennsylvania, July 13-17, 1970. Springer-Verlag.

Fransworth, D., J. Fink, a Thompson. Methods of Local and Global Differential Geometry in General Relativity: Proceedings of the Regional Conference on Relativity Held at the University of Pittsburgh, Pittsburgh, Pennsylvania, July 13-17, 1970. New York: Springer-Verlag, 1972.

Fransworth, D., et al. Methods of Local and Global Differential Geometry in General Relativity: Proceedings of the Regional Conference on Relativity Held at the University of Pittsburgh, Pittsburgh, Pennsylvania, July 13-17, 1970. Springer-Verlag, 1972.