Milliarcsec-scale radio structure of a matched sample of Seyfert 1 and Seyfert 2 galaxies D. V. Lal, P. Shastri and D. C. Gabuzda A&A, 425 1 (2004) 99-108 Published online: 10 September 2004 DOI: 10.1051/0004-6361:20040486