@article{CMJ_2008__58_4_a27,
     author = {Kla\v{s}ka, Ji\v{r}{\'\i}},
     title = {Criteria for testing {Wall's} question},
     journal = {Czechoslovak Mathematical Journal},
     pages = {1241--1246},
     publisher = {mathdoc},
     volume = {58},
     number = {4},
     year = {2008},
     mrnumber = {2471180},
     zbl = {1174.11020},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMJ_2008__58_4_a27/}
}