1. “Semi-continuity in the calculus of variations and absolute minima for isoperimetric problems,” Contributions to the Calculus of Variations, University of Chicago Press (1930).
2. Über konvexe Mengen in linearen normierten Räumen
3. Théorie des Opérations Linéaires, Warsaw 1933.
4. Weak Compactness in Banach Spaces: I