@article{10_21136_CMJ_1987_102171,
     author = {Dikranjan, Dikran and Fri\v{c}, Roman and Zanolin, Fabio},
     title = {On convergence groups with dense coarse subgroups},
     journal = {Czechoslovak Mathematical Journal},
     pages = {471--479},
     publisher = {mathdoc},
     volume = {37},
     number = {3},
     year = {1987},
     doi = {10.21136/CMJ.1987.102171},
     mrnumber = {904771},
     zbl = {0637.22002},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1987.102171/}
}