TY - JOUR AU - Nguyen Van Hieu TI - Spectral representation of the nonlinear susceptibilities of solids JO - Teoretičeskaâ i matematičeskaâ fizika PY - 1976 SP - 115 EP - 123 VL - 27 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TMF_1976_27_1_a10/ LA - ru ID - TMF_1976_27_1_a10 ER -