Klopman, « Chemical reactivity and the concept of charge- and frontier-controlled reactions », Journal of the American Chemical Society, vol. 90, no 2, , p. 223–234 (ISSN0002-7863, DOI10.1021/ja01004a002)
Salem, « Intermolecular orbital theory of the interaction between conjugated systems. I. General theory », Journal of the American Chemical Society, vol. 90, no 3, , p. 543–552 (ISSN0002-7863, DOI10.1021/ja01005a001)
Klopman, « Chemical reactivity and the concept of charge- and frontier-controlled reactions », Journal of the American Chemical Society, vol. 90, no 2, , p. 223–234 (ISSN0002-7863, DOI10.1021/ja01004a002)
Salem, « Intermolecular orbital theory of the interaction between conjugated systems. I. General theory », Journal of the American Chemical Society, vol. 90, no 3, , p. 543–552 (ISSN0002-7863, DOI10.1021/ja01005a001)