On Demonia (aka Antiterra, Earth’s twin planet on which VN’s novel Ada, 1969, is set) Flaubert’s novel Madame Bovary (1856) is known as Floeberg’s Ursula:
Van reached the third lawn, and the bower, and carefully inspected the stage prepared for the scene, ‘like a provincial come an hour too early to the opera after jogging all day along harvest roads with poppies and bluets catching and twinkle-twining in the wheels of his buggy’ (Floeberg’s Ursula). (1.20)