HI observations of loose galaxy groups - I. Data and global propertiesW. van Driel, P. Marcum, J. S. Gallagher, E. Wilcots, C. Guidoux and D. Monnier RagaigneA&A, 378 2 (2001) 370-393DOI: https://doi.org/10.1051/0004-6361:20011241