Karlström, Gunnar; Jönsson, Bo (6 February 2013). "Intermolecular interactions"(PDF). Theoretical chemistry – Lund University. p. 45. Archived(PDF) from the original on 18 September 2020. Retrieved 18 September 2020.
Karlström, Gunnar; Jönsson, Bo (6 February 2013). "Intermolecular interactions"(PDF). Theoretical chemistry – Lund University. p. 45. Archived(PDF) from the original on 18 September 2020. Retrieved 18 September 2020.
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Callister, William D. Jr.; Callister, William D. Jr. (2001). Fundamentals of materials science and engineering : an interactive etext. New York: Wiley. ISBN0-471-39551-X. OCLC45162154.