@conference{160551, author = {S Prosandeev and Eric Cockayne and Benjamin Burton}, title = {First Principles Calculations of Ionic Vibrational Frequencies in PbMg⅓Nb⅔0~3}, year = {2003}, number = {677}, month = {2003-08-01}, publisher = {Fundamental Physics of Ferroelectrics 2003 | | Fundamental Physics of Ferroelectrics 2003 | AIP}, language = {en}, }