1. Hitchcock, A. S. (1935).Manual of the Grasses of the United States. Washington.
2. Jenkin, T. J. (1931a). The interfertility ofLolium perenne andLolium peranne var.multiflorum.Bull Welsh Pl. Breed. Sta. Ser. H, no. 12, pp. 121-5.
3. Jenkin, T. J. (1931b). Self-fertility in perennial ryegrass.Bull. Welsh Pl. Breed. Sta. Ser. H, no. 12, pp. 100-19.
4. Jenkin, T. J. (1931c). The method and technique of selection, breeding and strain-building in grasses.Bull. Bur. Pl. Genet., Aberystw., no. 3, pp. 5-34.
5. Jenkin, T. J. (1933). Interspecific and intergeneric hybrids in herbage grasses. Initial crosses.J. Genet. 28, 205–64.