Handbook on the Physics and Chemistry of Rare Earths 
Karl A. Gschneidner, Jr., Jean-Claude G. Bšnzli and Vitalij K. Pecharsky 
 -  Elsevier  2010 
 -  40 .
<br/><br/><label>ISBN: </label>9780444532206 978-0-444-53220-6