1. P. Quezel and S. Santa, Nouvelle Flore de l_Algerie et des Regions Desertiques et Meridionales, Tome II, Edition CNRS, Paris, 1963, p. 989.
2. F. Bohlmann, M. K. Kleine, and H. Bornowski, Chem. Ber., 95, 2934 (1962).
3. J. A. Marco and O. Barberfi, in: Studies in Natural Products Chemistry, Atta-ur- Rahman (ed.), Elsevier, Amsterdam, 7A, 1990, p. 201.
4. M. Abu Zarga, R. Qauasmeh, S. Sabri, M. Munsoor, and S. Abdalla, Planta Med., 61 (3), 242 (1995).
5. T. J. Mabry, K. R. Markham, and M. B. Thomas, The Systematic Identification of Flavonoids, Springer, New York, 1970.