[1] [CITE@de[Base58 – Wikipedia]]
( ([TIME[2013-11-09 06:07:48 +09:00]] 版))
<http://de.wikipedia.org/wiki/Base58>

[2] [CITE@en-us[Flickr: Discussing manufacturing flic.kr style photo URLs in Flickr API]]
( ([TIME[2013-12-10 06:57:23 +09:00]] 版))
<http://www.flickr.com/groups/api/discuss/72157616713786392/>