TY - JOUR AU - I. Marek AU - Ya. Kincl TI - Relaxation length and nonnegative solutions in neutron transport theory JO - Doklady Akademii Nauk PY - 1976 SP - 297 EP - 299 VL - 228 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DAN_1976_228_2_a9/ LA - ru ID - DAN_1976_228_2_a9 ER -