@article{05700462, title = {Quality of TEC estimated with Mod\_Ion using GPS and GLONASS data.}, journal = {Mathematical Problems in Engineering}, volume = {2009}, year = {2009}, doi = {10.1155/2009/794578}, zbl = {1190.86007}, language = {en}, url = {http://dml.mathdoc.fr/item/05700462} }
de Oliveira Camargo, Paulo. Quality of TEC estimated with Mod_Ion using GPS and GLONASS data.. Mathematical Problems in Engineering, Tome 2009 (2009) . doi : 10.1155/2009/794578. http://gdmltest.u-ga.fr/item/05700462/