TY - JOUR AU - A. A. Lobashev AU - V. M. Mostepanenko TI - Quantum effects in nonlinear insulating materials in the presence of a~nonstationary electromagnetic field JO - Teoretičeskaâ i matematičeskaâ fizika PY - 1991 SP - 438 EP - 447 VL - 86 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TMF_1991_86_3_a12/ LA - ru ID - TMF_1991_86_3_a12 ER -