Testing the Seyfert unification theory: Chandra HETGS observations of NGC 1068 P. M. Ogle, T. Brookings, C. R. Canizares, J. C. Lee and H. L. Marshall A&A, 402 3 (2003) 849-864 Published online: 23 April 2003 DOI: 10.1051/0004-6361:20021647