1. Abernethy, J. L.: The Historical and Current Interest in Coumarin. J. Chem. Ed. 46, 561 (1969).
2. Abu-Mustafa, E. A., F. K. A. El-Bay, and M. B. E. Fayez: Natural Coumarins. XIII. Structure of Majurin, a New Constituent of Ammi majus L. Fruits. Tetrahedron Letters 1971, 1657.
3. Abu-Mustafa, E. A., F. K. A. El-Bay, and M. B. E. Fayez: Ammirin, a New Coumarin Constituent from Ammi majus L. Fruits. Naturwiss. 62, 39 (1975).
4. Abu-Mustafa, E. A., and M. B. E. Fayez: Natural Coumarins. I. Marmesin and Marmesinin, Further Products from the Fruits of Ammi majus L. J. Org. Chem. 26, 161 (1961).
5. Abyshev, A. Z.: Isogosferol, a New Furocoumarin from the Root of Prangos lophoptera. Khim. prirod. Soedinenii 10, 83 (1974); Chem. Abs. 80, 120816 (1974).