1. Atkin, J.D., Davis, G.N., 1954. Altering onion flowering dates to facilitate hybrid seed production. California Agricultural Experiment Station Bulletin, No. 746.
2. The influence of the storage temperature for onion bulbs on their seed production;Aoba;J. Jpn. Soc. Hortic. Sci.,1960
3. Studies on vegetatively propagated onions cultivated in Finland, with special reference to flowering and storage;Aura;Ann. Agric. Fenniae,1963
4. Studies on the vegetatively propagated onions cultivated in Finland, with special reference to flowering and storage. IX. The influence of various storage temperatures on flowering and yield in the North Finnish onion strain;Aura;Ann. Agric. Fenniae,1968
5. Flowers or bulbs with Allium cepa L.;Blaauw;Versl. Ned. Akad. Wet.,1941