The detection of stellar velocity dispersion drops in the central regions of five isolated Seyfert spiralsI. Márquez, J. Masegosa, F. Durret, R. M. González Delgado, M. Moles, J. Maza, E. Pérez and M. RothA&A, 409 2 (2003) 459-467DOI: https://doi.org/10.1051/0004-6361:20031059