How to Make the Citation of this Document using the INPE Standard (BibINPE Format)
PARDAL, P. C. P. M.; MORAES, R. V. D.; KUGA, H. K. Effects of geopotential and atmospheric drag effects on frozen orbits using nonsingular variables. Mathematical Problems in Engineering, v. 2014, (missing or empty field: 'pages') 2014. DOI: <10.1155/2014/678015>. Available from: <http://doi.org/10.1155/2014/678015>.
How to Make the In-Text Citation (by author/year)
... as proposed by Pardal, Moraes and Kuga (2014).
... may be found in the literature (PARDAL; MORAES; KUGA, 2014).