Mid-infrared spectro-interferometric observation of the Mira variable RR Sco with the VLTI/MIDI instrument. Ohnaka, K. ; Driebe, T. ; Hofmann, K. -H. ; Schertl, D. ; Weigelt, G. Abstract Publication: Astronomische Nachrichten Pub Date: August 2005 Bibcode: 2005AN....326R.567O