For Ornithogalum
Martínez-Azorín, M., M.B. Crespo, A. Juan, and M.F. Fay. 2011. Molecular phylogenetics of subfamily Ornithogaloideae (Hyacinthaceae) based on nuclear and plastid DNA regions, including a new taxonomic arrangement. Annals of Botany 107: 1-37.
Speta. 1998. In Kubitzki, K., ed. 1998a. The families and genera of vascular plants. III. Flowering plants – Monocotyledons – Lilianae (except Orchidaceae). Springer, Berlin. 478 pp.
Stace, C. 2010. New flora of the British Isles, third edition. Cambridge Univ. Press, Cambridge. 1232 pp.
Straley, G.B., and F.H. Utech. 2002h. Ornithogalum. In Flora of North America Editorial Committee. 2002a. Flora of North America north of Mexico. Volume 26, Magnoliophyta: Liliidae: Liliales and Orchidales. Oxford Univ. Press, New York, NY. 723 pp.
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