1. Al-Matar, S. M. In vitro propagation of longspur barrenwort (Epimedium grandiflorum ‘White Queen’ Morr.) and date palm (Phoenix dactylifera L.). University of Arkansas, Fayetteville, Arkansas. Master’s thesis; 1998:118 p.
2. Al-Matar, S. M.; Al-Khayri, J. M.; Klingaman, G. L. In vitro regeneration of Epimedium × youngianum ‘Roseum’. In Vitro Cell. Dev. Biol. (Abst.) 33:61A; 1997.
3. Ambler, W.; Christensen, C.; Hodgson, L.; Loewer, P.; Marston, T. Treasury of gardening. Illinois: Publications International Ltd.; 255; 1994.
4. Koga, S.; Shoyama, Y.; Nishioka, I. In vitro propagation of Epimedium species. Nat. Med. 48:49–52; 1994.
5. Mackenzie, D. S. Complete manual of perennial ground covers. New Jersey: Prentice Hall Inc.; 1989:133–134.