Malavolta, E., et al. “ Studies on the Mineral Nutrition of the Rice Plant: XIII. Effects of the Deficiencies of Micronutrients on the Varieties IAC-25 and IAC-47 ”. Anais Da Escola Superior De Agricultura Luiz De Queiroz, vol. 38, no. 2, Jan. 1981, pp. 669-86, https://doi.org/10.1590/S0071-12761981000200012.