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