@BOOK{ Book!D - 94048859,
AUTHOR = "/ [by] Paul R. Halmos",
TITLE = "A Hilbert space problem book",
LIBRARY= "كتابخانه مركزی و مركز اسناد دانشگاه مازندران",
SUBJECT = "Hilbert space- Problems, exercises, etc",
URL = "/book/94048859/A-Hilbert-space-problem-book/"}