Emmel & Pratt 1998. New subspecies of Lycaeninae from California and a type locality restriction for Chrysophanus cupreus W.H. Edwards (Lepidoptera: Lycaenidae). Emmel, Thomas C.[Ed]. Systematics of western North American butterflies., Mariposa Press, Gainesville, 1998: i-xviii, 1-878. Chapter pagination: 661-680