On our site we make extensive use of links to external sources. We do that for several reasons, of which the most important are: to back up our statements and to provide additional information to our visitors.
However, the owners of external webpages are free to remove or alternate the contents on their site. Hence we can’t guarantee that external links will still contain the content we have found there. Due to the great number of external links on this page, it’s impossible for us to check all these links regularly.
If you discover that a webpage we link to, either does not exist anymore or its contents has been changed significantly; please feel free to let us know about it. You can do that either by using our contact form or by posting a comment on the relevant post.