1. Benns G B, Hall J W and Beare-Rogers J L 1978 Intake of brassicaceous vegetables in Canada. Can J. Pub. Health 69, 64–66.
2. Bible B and Chong C 1975 Correlation of temperatures and rainfall with thiocyanate ion content in roots of radishes grown on two soil types. Hortic. Sci. 10, 484–485.
3. Bible B, Hak-Yoon J and Chong C 1980 Influence of cultivar, season, irrigation and date of planting on thiocyanate ion content in cabbages. J. Am. Soc. Hortic. Sci. 105, 88–91.
4. Chweya J A 1984 Yield and quality of kale as affected by nitrogen side-dressing, spacing and supplementary irrigation. Acta Hortic. 163, 295–301.
5. Chweya J A 1988 Nitrate-N and thiocyanate contents in kale (Brassica oleracea var. acephala, DC) leaves from some kale growing areas in Kenya. Acta Hortic. 218, 181–190.