%0 Journal Article %A V. R. Khalilov %T Spontaneous fermion creation in the~Coulomb field and Aharonov--Bohm potential in $2+1$~dimensions %J Teoretičeskaâ i matematičeskaâ fizika %D 2009 %P 250-262 %V 158 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/TMF_2009_158_2_a5/ %G ru %F TMF_2009_158_2_a5