Gruppen und Lie-Algebren von rationalen Funktionen.Published in:Mathematische Zeitschrift, 1969, v. 109, n. 5, p. 349, doi. 10.1007/BF01110558By:Koecher, MaxPublication type:Article
Concerning the isolated character of solutions of Plateau's problem.Published in:Mathematische Zeitschrift, 1969, v. 109, n. 5, p. 393, doi. 10.1007/BF01110559By:Nitsche, JohannesPublication type:Article