Ahmed, A.A. Mohamed, A.E.-H.H. Tzakou, O. Gani, A. Yannitsaros, A. El-Maghraby, M.A. Hassan, M.E. Zeller, K.-P., Three pyrone glucosidic derivatives from Conyza albida, Planta Medica, (68), 664-666, 2002, 0032-0943, 1439-0221