The Quarterly Journal of MathematicsA PROBLEM IN RELATIVISTIC QUANTUM MECHANICSW. D. EvansPublished Jan 1, 1966• 7 citationsPublisherAbstractW. D. EVANS; A PROBLEM IN RELATIVISTIC QUANTUM MECHANICS, The Quarterly Journal of Mathematics, Volume 17, Issue 1, 1 January 1966, Pages 345–358, https://doi.oDOI10.1093/qmath/17.1.345