Media type: E-Article Title: Order parameter symmetries and free-energy expansions for purely ferroelastic transitions Contributor: Tolédano, Jean-Claude; Tolédano, Pierre imprint: American Physical Society (APS), 1980 Published in: Physical Review B Language: English DOI: 10.1103/physrevb.21.1139 ISSN: 0163-1829 Origination: Footnote: