Media type: E-Article Title: Phase transitions, incommensurability and glass-like state in NH4)2(BeF4)I−x(SO4)xsystem Contributor: Strukov, Boris A. imprint: Informa UK Limited, 1988 Published in: Ferroelectrics Language: English DOI: 10.1080/00150198808215911 ISSN: 0015-0193; 1563-5112 Keywords: Condensed Matter Physics ; Electronic, Optical and Magnetic Materials Origination: Footnote: