2017-09-27: I have been putting in links from wisewiki pages to various outside Internet website pages for quite some time. But the Internet is notorious for website "coming and going", and I just looked up the average lifespan of a website, and it is 2 years 7 months, so let's call it three years to be charitable. So if you make a link to an outside website from Wisewiki, chances are in 3 years or less, the link will no longer be any good.
So what you have to do if you want to link to a specific article or wen-page, is to PDF it and save it in Google Drive, Mediafire, or Tikiwiki itself, in order to make sure that the links remain active and accurate. I am sure that there are already some of the links from the WISE Digital Library that do not work any more. The library should be for members only in any case.