1. Allen, E.J. 1978. Plant DensityIn “The Potato Crop” by P.M. Harris. Chapman and Hall, London, pp 178–326.
2. Bleasdale, J.K.A. 1965. Relationships between set characters and yield in main crop potatoes. J Agric Sci Camb. 64:361–366.
3. Bodlaender, K.B.A. 1963. Influence of temperature, radiation and photoperiod on development and yield.In “The Growth of the Potato” by Ivins and Milthorpe. Butterworths, London. pp 199–210.
4. Chucka, J.A., A. Hawkins, B.E. Bailey and F.H Steinmetz. 1945. Size of whole and cut seed and spacing in relation to potato yields. Maine Agric Exp Stn Bull 439.
5. Gregory, L.E. 1956. Some factors for tuberization in the potato plant. Am J Bot 43:281–288.