How to Make the Citation of this Document using the INPE Standard (BibINPE Format)
ECHER, E.; RIGOZO, N. R.; NORDEMANN, D. J. R.; VIEIRA, L. E. A. Prediction of solar activity on the basis of spectral characteristics of sunspot number. Annales Geophysicae, v. 22, p. 2239-2243, June 2004. (INPE-11071-PRE/6527). Available from: <http://urlib.net/ibi/6qtX3pFwXQZ3P8SECKy/CUaik>.
How to Make the In-Text Citation (by author/year)
... as proposed by Echer et al. (2004).
... may be found in the literature (ECHER et al., 2004).