%0 Journal Article %A N. R. Sibgatullin %T Proof of the Geroch conjecture for electromagnetic and neutrino fields in general relativity %J Doklady Akademii Nauk %D 1983 %P 603-607 %V 271 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1983_271_3_a20/ %G ru %F DAN_1983_271_3_a20