1. Anslow, R.C., 1963. Seed formation in perennial ryegrass. I. Anther exsertion and seed set. J Br Grassl Soc 18: 90–96.
2. Anslow, R.C., 1964. Seed formation in perennial ryegrass. II. Maturation of seed. J Br Grassl Soc 19: 349–357.
3. Beddows, A.R., 1931. Seed setting and fowering in various grasses. Welsh Plant Breeding Station, Bull 12, Ser H: 5–99.
4. Bhatnagar, S.P. & S. Chandra, 1975. Reproductive biology of Triticum. III. Unfertilized ovule and embryo sac; fertilization; post-fertilization changes in embryo sac and transformation of pistil into caryopsis in relation to time. Phytomorphology 25: 471–477.
5. Bugge, G., 1981. Genetic variability in the components of seed yield of ryegrass species. pp. 37–41. In: Breeding high yielding forage varieties combined with high seed yield. Report of the meeting of the Fodder Crops Section of Eucarpia in Merelbeke (Belgium), 8–10 September 1981.