@techreport{kam994,
 author = {Zden\v{e}k Dvo\v{r}\'ak},
 title = {$3$-choosability of planar graphs with $(\le\!4)$-cycles far apart},
 institution = {KAM-DIMATIA Series},
 year = {2011},
 number = {994},
 type = {prepublication}
}