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*"'''Cabbages'''. [...] There is a further division into Spring Cabbage, which may be cut either when semi-hearted, as 'spring greens', or when hearted; Summer to Autumn cabbage, cut from June to October; and Winter cabbage." Harrison S.G., Masefield G.B. & Wallis Michael, 1969. ''The Oxford Book of Food Plants''. Illustrations by B.E. Nicholson. Oxford University Press.
*"'''Spring Cabbage'''. This term is used for young cabbage, regardless of season. Increasing popularity in recent years has made it worthwhile for growers to extend the period of production; by commencing sowing in June, they have made 'Spring cabbage available from October to June." Harrison S.G., Masefield G.B. & Wallis Michael, 1969. ''The Oxford Book of Food Plants''. Illustrations by B.E. Nicholson. London, Oxford University Press. *"'''Spring cabbage'''. The term is applied totwo types: (1) spring greens grown for their resh, loose, leafy heads, and (2) spring hearting cabbage, which is hardy and grows slowly through the winter to mature in spring". Vaughan J.G. & Geissler C., 1997. ''The New Oxford Book of Food Plants''. Illustrations by B.E. Nicholson. With additional illustrations by E. Dowle & E. Rice. Oxford, Oxford University Press.
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