1. . Flowering Plants of the World. Oxford University Press: Oxford, 1979; 219.
2. . 100 Families of Flowering Plants. Cambridge University Press: Cambridge, 1981; 298.
3. . The Classi?cation of Flowering Plants, vol 2. Dicotyledons. Cambridge University Press: Cambridge, 1937; 411.
4. . Seseli. In Flora of Turkey and the East Aegean Islands, vol 4. Edinburgh University Press: Edinburgh, 1972; 367- 372.
5. Biology and Biochemistry of Reproduction and Contraception