A ring-like zone of strong radial gas motions in the disk of NGC 6181O. K. Sil'chenko, A. V. Zasov, A. N. Burenkov and J. BoulesteixAstron. Astrophys. Suppl. Ser., 121 1 (1997) 1DOI: https://doi.org/10.1051/aas:1997108
