Detailed images and distance measurements for eighteen dwarf irregular galaxies in the Canes Venatici cloudL. Makarova, I. Karachentsev, L. O. Takalo, P. Heinämäki and M. ValtonenAstron. Astrophys. Suppl. Ser., 128 3 (1998) 459-470DOI: https://doi.org/10.1051/aas:1998158