How to Make the Citation of this Document using the INPE Standard (BibINPE Format)
ECHER, E. On the quasi-biennial oscillation (QBO) signal in the foF2 ionospheric parameter. Journal of Atmospheric and Solar-Terrestrial Physics, v. 69, n. 4-5, p. 621-627, 2007. Available from: <http://urlib.net/ibi/6qtX3pFwXQZGivnK2Y/QyyyM>.
How to Make the In-Text Citation (by author/year)
... as proposed by Echer (2007).
... may be found in the literature (ECHER, 2007).