%0 Journal Article %A A. S. Ivanova %A M. A. Parinov %T First Integrals of Lorentz Equations for Certain Classes of Electromagnetic Fields %J Trudy Matematicheskogo Instituta imeni V.A. Steklova %D 2002 %P 197-203 %V 236 %I mathdoc %U http://geodesic.mathdoc.fr/item/TM_2002_236_a19/ %G ru %F TM_2002_236_a19