Look-alike galaxies: - HI observations for look-alike galaxies of four calibratorsL. Bottinelli, L. Gouguenheim, G. Theureau, N. Coudreau and G. PaturelAstron. Astrophys. Suppl. Ser., 135 3 (1999) 429-436DOI: https://doi.org/10.1051/aas:1999451