Unveiling the structure of the planetary nebula M 2-48: - Kinematics and physical conditions L. López-Martín, J. A. López, C. Esteban, R. Vázquez, A. Raga, J. M. Torrelles, L. F. Miranda, J. Meaburn and L. Olguín A&A, 388 2 (2002) 652-659 Published online: 31 May 2002 DOI: 10.1051/0004-6361:20020502