Pascual Jordan

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Ernst Pascual Jordan (18 October 1902 – 31 July 1980) was a theoretical and mathematical physicist who made significant contributions to quantum mechanics.

Born, Max, and Pascual Jordan. "Zur quantenmechanik." Zeitschrift für Physik 34.1 (1925): 858-888.
http://link.springer.com/article/10.1007/BF01328531

Born, Max, Werner Heisenberg, and Pascual Jordan. "Zur Quantenmechanik. II." Zeitschrift für Physik 35.8-9 (1926): 557-615.
http://link.springer.com/article/10.1007/BF01379806

Jordan, P., and Eugene P. Wigner. "Über das Paulische Äquivalenzverbot." Zeitschrift fur Physik 47 (1928): 631.
http://link.springer.com/article/10.1007%2FBF01331938?LI=true

Jordan, Pascual, John von Neumann, and Eugene P. Wigner. "On an algebraic generalization of the quantum mechanical formalism." Annals of Mathematics, Vol. 35, No. 1 (Jan., 1934), pp. 29-64.
http://www.jstor.org/stable/1968117?seq=1#page_scan_tab_contents