found: Palast der blauen Delphine, c1994:t.p. (Brigitte Riebe) jkt. (b. 1953 in Munich; studied history, German, and art history; former teacher; currently lives in Munich as a writer)
found: Gruber, Felicitas. Blaues Blut, 2015:t.p. (Felicitas Gruber) page 2 (pseudonym of the authors Brigitte Riebe, a historian, and Gesine Hirsch, an art historian; both authors live in Munich)
found: Deutsche Nationalbibliothek, July 15, 2018(Felicitas Gruber; female, works in Munich; literary author, screenwriter; joint pseudonym of Brigitte Riebe and Gesine Hirsch)