Observation of [CI] toward the GL 2591 and W28 A2 Molecular Outflows
  Molecular outflows associated with GL 2591 and W28 A2 were observed in the 492 GHz [CI] line. Upper limits are set on the [CI] emission in the extremely high velocity line wings. These limits are discussed in terms of wind-driven and jet-driven models of molecular outflows. 
Choi, Evans, Jaffe, and Walker