U.S. Camera, October 1940
Ylla (nee Camilla Koffler ; 16 Agustus 1911 – 30 Maret 1955) adalah seorang fotografer Hungaria yang berspesialisasi dalam fotografi hewan. Pada saat kematiannya dia "umumnya dianggap sebagai fotografer hewan paling mahir di dunia."[ 1]
^ "Fall Kills Ylla, Camera Artist," New York Times (Obituary) (31 March 1955).
Beaumont Newhall : Photography 1839-1937 (Museum of Modern Art, New York, 1937)
John Szarkowski : The Photographer’s Eye (Museum of Modern Art, New York, 1966)
“Charles Rado, 71, of Photo Agency; Developed Popular Books from Ylla's Portfolio”, New York Times , October 5, 1970. (Obituary)
Ylla (Musée Nicéphore Niépce, Chalon-sur-Saône, 1983)
The Animal in Photography 1843-1985 , ed. Alexandra Noble (The Photographers’ Gallery, London, 1986)
Les Femmes Photographes de la Nouvelle Vision en France 1920-1940 , Christian Bouqueret (Editions Marval, Paris, 1998)
1000 Dogs , ed. Raymond Merritt & Miles Barth (Taschen, Cologne, 2002)
Umum Perpustakaan nasional Lembaga penelitian seni Basis data ilmiah Lain-lain