English Willi Jäger Cited by user Turgidson on 30 Dec 2019 He completed his Ph.D. in 1966 under the direction of Erhard Heinz.
English Bernold Fiedler Cited by user Suslindisambiguator on 30 Mar 2018 Bernold Fiedler (born 15 May 1956) is a German mathematician, specializing in nonlinear dynamics.