e114.
Colin J. Campbell (1991), The Golden Century of Oil 1950–2050; F.K. North (1985), Petroleum Geology; Norman J. Hyne (1995), Nontechnical Guide to Petroleum Geology, Exploration, Drilling and Production; Fredrick Robelius, “Giant Oilfields: The Highway to Oil”, 2007, PhD thesis, available at http://tinyurl.com/oe8t2u6 .