TY - JOUR AU - V. R. Khalilov TI - Polarization of vacuum by an external magnetic field in the $(2+1)$-dimensional quantum electrodynamics with a nonzero fermion density JO - Teoretičeskaâ i matematičeskaâ fizika PY - 2000 SP - 132 EP - 151 VL - 125 IS - 1 UR - http://geodesic.mathdoc.fr/item/TMF_2000_125_1_a5/ LA - ru ID - TMF_2000_125_1_a5 ER -