D. Sen, A. Rakshit, N. C. Sarkar, D. C. Ghosh, and S. K. Bardhan Roy, “Effect of Transplanting Dates and Spacing on Yield Attributing Character, Productivity and Economics of Potato Cultivation Through True Potato Seed (TPS) Technology”, Ital J Agronomy, vol. 5, no. 1, pp. 35–42, Mar. 2010.