Gas and dust in Comet C/2000 WM1 during its closest approach to Earth: Optical imaging and long-slit spectroscopyL.-M. Lara, G. P. Tozzi, H. Boehnhardt, M. DiMartino and R. SchulzA&A, 422 2 (2004) 717-729DOI: https://doi.org/10.1051/0004-6361:20040159