[1] She performed from 1947 to 1953 in the vocal ensemble for early music Pro Musica Antiqua, founded by Safford Cape, which toured to Germany, Italy and Spain.
[2] She appeared in concert at the BBC Proms in the Royal Albert Hall on 3 September 1968, singing Le marteau sans maître by Pierre Boulez, conducted by the composer.
[4] She participated in the first recording of Le Marteau sans maître by Boulez,[5] with flutist Severino Gazzelloni, percussionists Jean Batigne and Georges van Gucht, and vibraphonist Claude Ricou, conducted by the composer.
[6] She was a soloist in a recording of Debussy's Le Martyre de saint Sébastien, with Eva Maria Rogner, Marijana Radev, choir and orchestra of the Bavarian Radio, conducted by Boulez.
[This quote needs a citation] Deroubaix recorded Beethoven's Missa solemnis with Günter Wand conducting chorus and orchestra of the Gürzenich in Cologne, alongside Leonore Kirschstein, Peter Schreier and Günther Morbach.