A morpho-kinematic and spectroscopic study of the bipolar nebulae: M 2−9, Mz 3, and Hen 2−104 N. Clyne, S. Akras, W. Steffen, M. P. Redman, D. R. Gonçalves and E. Harvey A&A, 582 (2015) A60 Published online: 08 October 2015 DOI: 10.1051/0004-6361/201526585