Shen, H Y Three-dimensional oxalate-bridged heterometal supramolecular complex with a large helical tunnel of 21.191 x 9.294 A 2. [electronic resource] - Inorganic chemistry May 2000 - 2239-42 p. digital Publication Type: Journal Article ISSN: 0020-1669 Standard No.: 10.1021/ic991325n doi