%0 Journal Article %A I. Yu. Krivsky %A V. M. Simulik %T Noether analysis of~zilch conservation laws and their generalization for the electromagnetic field. %J Teoretičeskaâ i matematičeskaâ fizika %D 1989 %P 340-352 %V 80 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/TMF_1989_80_3_a1/ %G ru %F TMF_1989_80_3_a1