Davis, D.R.; Epp, M.D.; Riordan, H.D. "Changes in USDA Food Composition Data for 43 Garden Crops, 1950 to 1999". Journal of the American College of Nutrition. 23 (6). 2004: 669–682. doi:10.1080/07315724.2004.10719409. PMID15637215.
Lammerts van Bueren, E.T.; S.S. Jones; L. Tamm; K.M. Murphy; J.R. Myers; C. Leifert; M.M. Messmer. "The need to breed crop varieties suitable for organic farming, using wheat, tomato and broccoli as examples: A review". NJAS - Wageningen Journal of Life Sciences. 58 (3–4). 2010: 193–205. doi:10.1016/j.njas.2010.04.001.
Lammerts van Bueren, E. T.; G. Backes; H. de Vriend; H. Ostergard. "The role of molecular markers and marker assisted selection in breeding for organic agriculture". Euphytica. 175. 2010: 51–64. doi:10.1007/s10681-010-0169-0.
Davis, D.R.; Epp, M.D.; Riordan, H.D. "Changes in USDA Food Composition Data for 43 Garden Crops, 1950 to 1999". Journal of the American College of Nutrition. 23 (6). 2004: 669–682. doi:10.1080/07315724.2004.10719409. PMID15637215.