C. F. O. Santos and I. R. Nogueira, “ Variation of fiber dimentions in growth rings, taken at breast height and at three aditional level of trunk height ”, An. Esc. Super. Agr. Luiz de Queiroz, vol. 31, pp. 269–287, Jan. 1974, doi: 10.1590/S0071-12761974000100020.