1. Global Energy (2016) Challenges and solutions in an upstream and downstream oil and gao operation. http://globalenergy.pr.co/65678-challenges-and-solutions-in-an-upstream-and-downstream-oil-and-gas-operation. Accessed on 6 Aug 2016
2. Midstream https://en.wikipedia.org/wiki/Midstream. Accessed on 6 Aug 2016
3. U.S. Oil and Gas Pipeline Mileage https://www.bts.gov/content/us-oil-and-gas-pipeline-mileage. Accessed on 8 Oct 2018
4. Where are the Pipelines? https://www.api.org/oil-and-natural-gas/wells-to-consumer/transporting-oil-natural-gas/pipeline/where-are-the-pipelines. Accessed on 8 Oct 2018
5. Oil Tankers http://www.oceansatlas.org/subtopic/en/c/298/. Accessed on 2 July 2022