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Removed reference to Mandelstam variables (which were introduced by S. Mandelstam, not Leonid Mandelstam) in the paper Phys. Rev. 112 (1958) 1344. 142.3.164.195 21:25, 1 March 2006 (UTC) reply

This article was automatically assessed because at least one WikiProject had rated the article as stub, and the rating on other projects was brought up to Stub class. BetacommandBot 13:25, 9 November 2007 (UTC) reply