1. http://blog.brazencareerist.com/2014/03/04/recruiters-consider-open-ended-job-postings/
2. Manpower Planning and recruiting by IAIN Maitland
3. http://www.washingtonpost.com/business/capitalbusiness/zappos-gets-rid-of-job-postings/2014/05/23/7ce4724e-e289-11e3-8dcc-d6b7fede081a_story.html
4. http://blog.brazencareerist.com/2014/07/03/one-companys-decision-eliminate-job-postings-affect-recruiting/
5. http://talent.linkedin.com/blog/index.php/2014/11/why-did-zappos-ditch-its-job-postings-and-is-the-strategy-working
6. https://www.americanexpress.com/us/small-business/openforum/articles/from-apple-to-zappos-could-big-companies-hiring-tactics-work-for-you/