マドレーヌ・グレイ
↑ Maurice Ravel. Lettres, écrits, entretiens; [edited by] Arbie Orenstein. Paris: Flammarion, 1989. p.189 (Letter 180). ISBN 2080661035 ; OCLC 20025651.
↑ John Steane, in: Grove Music Online; edited by L. Macy; article on Madeleine Grey (accessed 12 March 2007)