Get high quality backlinks from website which their root domains has PR9 Google Page Rank.
Your links will be place on website which their root domains are below : (edu backlinks and high authority website)
apache.org ethz.ch flickr.com universia.net issuu.com vimeo.com coursera.org qualtrics.com joomla.org stanford.edu disqus.com aol.com intel.com mozilla.org drupal.org topuniversities.com adobe.com apple.com europe.eu nature.com wordpress.com cnn.com blogger.com google.com amazon.com (all domains PR9)
This kind of backlinks is a must for every websites, it's safe, powerfull and google friendly.
I can handle many gigs at a time because i have big team to complete orders.
Contact me if you have question.