Link on Wiki website? There is one or more for just about anything, example: http://gameofthrones.wikia.com/wiki/Game_of_Thrones_Wiki
Click the link I gave you above, is the example of a wiki page. You can find one in any niche. You make a wiki page on those websites and put your link there.
Wiki is a knowledge\information organisation model, usually used in a complex projects that require knowledge of special vocabulary. That's basically it. In recent years wiki links, that lead out from their domains are "nofollow" links
Wiki link are the reference link it is used to verify any information like I am writing about some company and in order to verify the the company I would give reference of the main company website to tell others that Information on wiki is true and it can be verified from the owner by looking at the reference provided.