Racking oil prices in USarticles literature review

Subject: Find 5 articles (as below links) and research into fracking oil prices in US and make the Literature Review.
Articles links:
1) /resourceroyaltyllc.com/educational-information/articles/DanielYerginWSJ02042011.pdf

3) html

5) ib132

(Note: If you do not like or do not able e.g.:(do not find it relevant about the topic), you can find another article from any Google scholar websites which is relevant with the fracking oil prices in US. Also these are should be articles. I have chosen these 5 articles.)