A disc inside the bipolar planetary nebula M2-9 F. Lykou, O. Chesneau, A. A. Zijlstra, A. Castro-Carrizo, E. Lagadec, B. Balick and N. Smith A&A, 527 (2011) A105 Published online: 03 February 2011 DOI: 10.1051/0004-6361/200913845