[1]
M. G. de Andrade, A. S. T. de Lima, W. J. de Melo, E. J. dos Santos, and A. B. Herrmann, “Trace elements in two Oxisols after annual application of sewage sludge for thirteen years”, Semina: Ciênc. Agrár., vol. 35, no. 1, pp. 135–148, Feb. 2014.