Write a Literature Review with the following headings:

1. Overview of Main Theories
2. Discussion of Theory 1
3. Discussion of Theory 2
4. Discussion of Theory 3
5. Integration of Theories
   The Literature Review must be about Supply Chain Constrains of petroleum products to
   filling stations.
   Research Questions
6. What are the causes of supply and transportation problems in Puma Garages?
7. What are supply and transportation problems in Puma Garages?
8. How can supply and transportation problems facing Puma Energy South Africa be resolved?