1. Abdalla, A.A., and Mann, L.K. 1963. Bulb development in the onion (Allium cepa L.) and the effect of storage temperature on bulb rest. Hilgardia 35, 85–112.
2. Bertaud, D.S. 1988. Effects of chilling duration, photoperiod, and temperature on floral initiation and development in sprouted and unsprouted onion bulbs. In Fourth Eucarpia Allium Symposium, Warwick, U.K., pp. 254–261, United Kingdom.
3. Brewster, J.L. 1977. The physiology of the onion. Hort. Abst. 47, 102–112.
4. Brewster, J.L. 1994. Onions and Other Vegetable Alliums. CAB International, Wallingford, U.K.
5. Brewster, J.L., and Rabinowitch, H.D., eds. 1990. Onions and Allied Crops. Vol. III: Biochemistry, Food Science and Minor Crops. CRC Press, Boca Raton, FL.