^N.Y. Krylov, A.A. Bokserman, E.R.Stavrovsky. The Oil Industry of the Former Soviet Union. CRC Press, 1998. P. 187.
^Black Gold: Canada's Oil Heritage. The Corporation of the County of Lambton. [30 July 2013]. （原始内容存档于2013年7月29日）. The North American oil industry began in Oil Springs in 1858 in less spectacular fashion. James Miller Williams, a coachmaker from Hamilton, dug into the tar-like gum beds of Enniskillen Township to find their source. At a depth of fourteen feet, he struck oil. Williams immediately built a small refinery and began to produce illuminating oil for lamps - kerosene. It was Williams who was able to take full advantage of the ancient resource. Not only was he astute enough to look below the surface of the gum beds to find oil and to realize its commercial potential, but the timing of his discovery was perfect.
^Vassiliou, Marius (2009). Historical Dictionary of the Petroleum Industry. Lanham, MD: Scarecrow Press (Rowman and Littlefield), 700 pp.