TY - JOUR AU - F. V. Bunkin AU - I. I. Tugov TI - The possibility of electron-positron pair production in vacuum when laser radiation is focussed JO - Doklady Akademii Nauk PY - 1969 SP - 541 EP - 544 VL - 187 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1969_187_3_a16/ LA - ru ID - DAN_1969_187_3_a16 ER -