1. Axelrod, B.; Belzille, J.R.: Isolation of an alkaloid, annuloline from the roots of Lolium multiflorum. J. Org. Chem. 23, 919?920 (1958)
2. Copeland, L.O.; Hardin, E.E.: Out-crossing in the ryegrass (Lolium spp.) as determined by fluorescence test. Crop Sci. 10, 254?257 (1970)
3. Corkill, L.: Breeding for quality in herbage plants. Proc.IX. Intern. Grassl. Cong. 205?209 (1964)
4. Jenkins, T.J.: The ryegrasses (Lolium L.) Handb. Pflanzuchtg. 4, 435?452 (1959)
5. Linehan, P.A.; Mercer, S.P.: A method of distinguishing certain strains of New Zealand perennial ryegrass (Lolium perenne L.) by examination of seedlings under screened ultra-violet light. Sci. Proc. Roy. Dublin Soc. 20, 75?83 (1931)