Écho, 2017 container (Julie Dorus-Gras; a leading singer of the 19th century; appeared in premieres of operas by Donizetti, Berioz, Meyerbeer and Halévy)
Wikipedia, March 27, 2018 (Julie Dorus-Gras; born Julie-Aimée-Josèphe Van Steenkiste, September 7, 1805, Valenciennes; died February 6, 1896, Paris; Belgian operatic soprano)
Grove music online, March 27, 2018 (Dorus-Gras (née Van Steenkiste), Julie-(Aimée-Josephe (Joséphine)); born September 7, 1805, Valenciennes; died February 6, 1896, Paris; Belgian soprano)