[1] Ginster gave concerts in Austria, Belgium, France, Finland, Holland, Italy, Norway, Sweden and Switzerland, and from 1934 also in the U.S. and Canada.
[3] The same year, she was the soprano soloist, alongside Hans Hotter, in A German Requiem by Johannes Brahms, conducted by Herbert von Karajan.
[4] The program of a recital at Wigmore Hall in London on 7 February 1934 with pianist George Reeves began with Italian arias, followed by groups of songs by Schubert, Brahms, Debussy and Hugo Wolf.
[5] In a recital at Grotrian Hall in London on 11 January 1938, with Reeves and clarinetist Charles Draper, she sang works by Mozart ("Das Veilchen"), Brahms ("Meine Liebe ist grün"), Schubert ("The Shepherd on the Rock"), Hans Pfitzner, and Reger ("Mariae Wiegenlied").
[6] In 1938, Ginster was appointed professor and head of the concert class at the Zurich University of the Arts, with students including Hilde Zadek.