1. Ganze L�sungen der Differentialgleichung ?u=e u
2. A Note on Unrestricted Solutions of the Differential Equation Δu
=f
(u
)
3. ?u=e u und die automorphen Funktionen
4. and , Die Differential- und Integralgleichungen der Mechanik und Physik, I, Second Edit., Rosenberg, New York, 1943.
5. Electrohydrodynamics I. The equilibrium of a charged gas in a container, Research Report No. MH-1 Division of Electromagnetic Research, Institute of Mathematical Sciences, New York University, January 1955, and