TY - JOUR TI - The compton-thick Seyfert 2 nucleus of NGC 3281: torus constraints from the 9.7 'mü'm silicate absorption PY - 2011 AU - Sales, Dinalva A AU - Pastoriza, M. G AU - Riffel, R AU - Winge, C AU - Rodríguez-Ardila, A AU - Carciofi, Alex Cavaliéri T2 - The Astrophysical Journal SN - 0004-637X PP - Chicago VL - 738 SP - 109/1-109/7 ER -