TY - JOUR AU - V. R. Khalilov TI - Spontaneous fermion creation in the~Coulomb field and Aharonov--Bohm potential in $2+1$~dimensions JO - Teoretičeskaâ i matematičeskaâ fizika PY - 2009 SP - 250 EP - 262 VL - 158 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TMF_2009_158_2_a5/ LA - ru ID - TMF_2009_158_2_a5 ER -