On convex functions and their applications to entire functions
On axially symmetric superposable flows of the type curl $q_1=\lambda_2q_2$, curl $q_2=\lambda_1q_1$
The perihelion motion and deflection of light
On the derivatives of the mean values of integral functions represented by Dirichlet series
Über die Veranderung der Fackelflachen in Sonnen-Aktivitatszentren
Steady flows of two conducting incompressible and immiscible fluids
Obsrvations des taches solaires en 1962
Abbildung durch zwei Netze mit einer gemeinsamen Leitgeraden
Congruences of curves through points of a subspace and hypersurface of a Finsler space