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http://en.wikipedia.org/wiki/Lorentz_transformation
http://en.wikipedia.org/wiki/Derivations_of_the_Lorentz_transformations
http://hyperphysics.phy-astr.gsu.edu/hbase/relativ/ltrans.html
http://www.bartleby.com/173/a1.html
http://www.phy.ohiou.edu/~elster/lectures/advqm_2.pdf
http://oyc.yale.edu/sites/default/files/notes_relativity_3.pdf
http://arxiv.org/ftp/physics/papers/0702/0702157.pdf
http://www.phys.ufl.edu/courses/phy3221/spring11/lecture4.pdf
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