00712nam a2200157Ia 4500082002000000100012200020240006100142245016800203260003500371300001400406440005400420500000500474653000600479700003400485700003500519  a515.72bC714.CO  aColloquium on Contributions to operator theory in spaces with an indefinite metric, Univ. of Vienna, Oct. 12-13, 1995  aHeinz Langer anniversary volume on his sixtieth birthday  aContributions to operator theory in spaces with an indefinite metric; the Heinz Langer anniversary volume on his sixtieth birthdaybcEd. by A. Dijksma and others.  aBaselbBirkhauser Verlagc1998  avi, 417p.  aOperator theoryvadvances and applicationsvv.106  a  a   aDijksma, A. and others ; eds.  aLanger, Heinz. Anniversary vol