found: Splines in numerical analysis, 1989:title page (Jochen W. Schmidt) title page verso (Prof. Dr.) cover (J.W. Schmidt)
found: LC data base, January 26, 1990 (hdg.: Schmidt, Jochen W.)
found: Multivariate approximation and splines, 1997:CIP title page (Jochen W. Schmidt) title page verso (Institut für Numerische Mathematik, Technische Universität Dresden) data sheet (born August 4, 1931 [i.e. August 8?; see note below])
found: Recent progress in multivariate approximation, volume 137 (2001), viewed online on November 5, 2019:pages 19-20 (Jochen W. Schmidt in memoriam; Prof. Dr. Jochen W. Schmidt; born August 8, 1931, in Neukloster, Mecklenburg; died unexpectedly on May 14, 2000; studied at Rostock and Greifswald; joined the faculty at the Technische Universität Dresden in 1956; obtained his doctorate in 1959) - https://link.springer.com/chapter/10.1007%2F978-3-0348-8272-9_1