BRS Invariance of Unoriented Open-Closed String Field Theory
  We present the full action for the unoriented open-closed string field theory which is based on the \alpha=p^+ HIKKO type vertices. The BRS invariance of the action is proved up to the terms which are expected to cancel the anomalous one-loop contributions. This implies that the system is invariant under the gauge transformations with open and closed string field parameters up to the anomalies. 
Tsuguhiko Asakawa, Taichiro Kugo and Tomohiko Takahashi