Jacintho, A. O., & Glória, N. A. da. (1976). The cobalt determination in plant material by the spectrophotomeeric method of the 2,2,-dipyridyl ketoxime . Anais Da Escola Superior De Agricultura Luiz De Queiroz, 33, 55-66. https://doi.org/10.1590/S0071-12761976000100004