1. Polyamines as possible indicators of physiological age;Apelbaum;Potato Res.,1984
2. Biotto, C., Siegenthaler, P.A., 1991. Study of physiological states of seed potato tubers during their storage. Correlations between morphological and biochemical parameters. Réunion de la Section Physiologie EAPR, Le Conquet, France, pp. 39–40.
3. Bodlaender, K.B.A., Dekhuijzen, H.M., Marinus, J., Van Es, A., Hartmans, K.L., Kupers, L.J.P., Van Loon, C.D., Van der Zaag, D.E., 1987. Effect of physiological age on growth vigour of seed potatoes. A study with seed tubers of two cultivars stored at two different temperatures. Rapport 555. Instituut voor Bewaring en Verwerking van Landbouwprodukten (IBVL), Wageningen, the Netherlands, p. 142.
4. The estimation of percentage light interception from leaf area index and percentage ground cover in potatoes;Burstal;J. Agric. Sci., Camb.,1983
5. Influence of crop origin and storage system on physiological age, crop growth and tuber yield of seed potato (Solanum tuberosum L.);Caldiz;Indian J. Agric. Sci.,1991