Journal Article SELF-ADJOINT OPERATORS IN INDEFINITE INNER PRODUCT SPACES Get access K. C. HANNABUSS K. C. HANNABUSS Balliol CollegeOxford OX13BJ Search for other works by this author on: Oxford Academic Google Scholar The Quarterly Journal of Mathematics, Volume 39, Issue 3, September 1988, Pages 333–348, https://doi.org/10.1093/qmath/39.3.333 Published: 01 September 1988 Article history Received: 24 March 1987 Published: 01 September 1988