TY - JOUR AU - I. P. Yarovenko TI - A formula for the gradient of the output signal in positron emission tomography JO - Dalʹnevostočnyj matematičeskij žurnal PY - 2015 SP - 121 EP - 128 VL - 15 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DVMG_2015_15_1_a10/ LA - ru ID - DVMG_2015_15_1_a10 ER -