Flavonoids and Isoflavonoids with Antiplasmodial Activities from the Root Bark of Erythrina abyssinica - Yenesew, Abiy; Derese, Solomon; Irungu, Beatrice; Midiwo, Jacob O; Waters, Norman C; Liyala, Pamela; Akala, Hoseah; Heydenreich, Matthias; Peter, Martin G (Planta Medica, 2003)