1. Davies, H.T.; Jonston, G.R.: Reliability of potato selection in the first clonal generation. Am. Potato J.51, 8–11 (1974)
2. Domański, L.; Świeżyński, J.: Ocena plonu i cech morfologicznych bulw u siewek ziemniaka. Biul. I. Ziem. Nr18, 7–30 (1976)
3. Howard, H.W.: Some potato breeding problems. Rep. Plant. Breed. Inst. Cambridge 1961–1962, 5–21 (1963)
4. Krug, H.; Wriedt, G.; Weber, W.E.: Untersuchungen zur Frühselektion in der Kartoffelzüchtung. Z. Pflanzenzücht.73, 141–193 (1974)
5. Lam, S.L.; Grenard, R.: Potato selection for high dry matter in seedling generation. Am. Potato J.53, 285–291 (1976)