Coincidence degree and Rabinowitz's bifurcation theorem. V. Stallbohm; G. Hetzer — 1976 Publications de l'Institut Mathématique [Elektronische Ressource]
Eine Existenzausgabe für asymptotisch lineare Störungen eines Fredholmoperators mit Index 0. V. Stallbohm; G. Hetzer — 1977 Manuscripta mathematica
Coincidence Degree And Rabinowitz's Bifurcation Theorem G. Hetzer; V. Stallbohm — 1976 Publications de l'Institut Mathématique
Local solution for the Kadomtsev-Petviashvili equation with periodic conditions. J.P. Isaza; J.L. Mejía; V. Stallbohm — 1992 Manuscripta mathematica