1. AAPG Memoir 6;E.W. Owen,1975
2. R.C. Selley: Elements of Petroleum Geology, 2nd edn. (Academic, London 1998) p. 470
3. J.T. Henry: The Early and Later History of Petroleum (Rodgers, Philadelphia 1873)
4. L. Maugeri: The Age of Oil: The Mythology, History, and Future of the World’s Most Controversial Resource (Globe Pequot, Guilford 2006)
5. I.M. Tarbell: The History of the Standard Oil Company (Cosimo, New York 2009) p. 462