This image is a derivative work of the following images: File:Pioneers_pin.svg licensed with PD-RU-exempt 2009-04-03T17:05:19Z Ahnode 500x500 (273442 Bytes)
JPG Image:Webcomic xkcd - Wikipedian protester.png DOI resolutions graph File:WikiCite_wordmark.svg The graphs are generated by [1] and [2]. English author
work, hereby publish it under the following licenses: You may select the license of your choice. English DOI Foundation logo determination method: SHA-1