The HI halo of NGC 2403
  Deep VLA HI observations of the nearby spiral galaxy NGC 2403 reveal the presence of an extended HI halo that shows slower rotation and a general inflow (about 15-25 km\s) towards the center of the galaxy. 
Filippo Fraternali (IRA and Bologna Univ.), Tom Oosterloo (NFRA),   Renzo Sancisi (AOB and Kapteyn Inst.), Gustaaf van Moors...