[4] Welch R M, Graham R D. Field Crops Research, 1999, 60: 1.
[5] Welch R M, Graham R D. Journal of Experiment Botany, 2004, 55: 353.
[6] Welch R M, Graham R D. Journal of Trace Elements in Medicine and Biology, 2005, 18(4): 299.
[7] Frossard E, Bucher M, Machler F, et al. Journal of the Science of Food and Agriculture, 2000, 80: 861.
[8] Bouis H E. Journal of Nutrition, 2002, 132: 491S.
[16] Peterson C J, Johnson V A, Mattern P J. Cereal Chemistry, 1986, 63(3): 183.
[17] Raboy V. Journal of Nutrition, 2002, 132: 503S.
[18] Stangoulis J C R, Huynh B L, Welch R M, et al. Euphytica, 2007, 154(3): 289.