1. Generalized axially symmetric potential theory
2. Leçons sur la théorie générale des surfaces, 2nd edition, Volume II, Gauthier-Villars, Paris, 1915, Ch. III, IV.
3. and , On the fundamental solutions of a singular Beltrami operator, in R. von Mises anniversary volume (in press).
4. On the uniqueness of generalized axially symmetric potentials, Annals of Mathematics (in press).