| 1 | Ceccarelli, S., Guimaraes, E.P., Weltzien, E., 2009. Plant Breeding and Farmer Participation, FAO, 671 p. | 
				| 2 | Bradshaw, J.E., 2010. Handbook of Plant Breeding: Root and Tuber Crops, 295 s. Springer, | 
				| 3 | Hancock, J.F., 2008. Temperate Fruit Crop Breeding, Springer, 455 p. |