M. J. Robson, A Comparison of British and North African Varieties of Tall Fescue (Festuca arundinacea). I. Leaf Growth During Winter and the Effects on it of Temperature and Daylength, Journal of Applied Ecology, Vol. 4, No. 2 (Nov., 1967), pp. 475-484
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Matthew J. Robson (1967) studied this question.
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