W. Martienssen, Hans Warlimont: Springer Handbook of Condensed Matter and Materials Data. Springer, 2005, ISBN 3-540-44376-2, S. 462. GoogleBook (页面存档备份,存于互联网档案馆)
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W. Martienssen, Hans Warlimont: Springer Handbook of Condensed Matter and Materials Data. Springer, 2005, ISBN 3-540-44376-2, S. 462. GoogleBook (页面存档备份,存于互联网档案馆)