H I absorption in 3C 49 and 3C 268.3 - Probing the environment of compact steep spectrum and GHz peaked spectrum sourcesA. Labiano, R. C. Vermeulen, P. D. Barthel, C. P. O'Dea, J. F. Gallimore, S. Baum and W. de VriesA&A, 447 2 (2006) 481-487DOI: https://doi.org/10.1051/0004-6361:20053856