%0 Journal Article %A S. Özer %A E. Suhubi %T Equivalence Groups for First-Order Balance Equations and Applications to Electromagnetism %J Teoretičeskaâ i matematičeskaâ fizika %D 2003 %P 271-280 %V 137 %N 2 %U http://geodesic.mathdoc.fr/item/TMF_2003_137_2_a11/ %G ru %F TMF_2003_137_2_a11