1, 【作者】:D. B. Litvin 【题名】:Ferroic classifications extended to ferrotoroidic crystals 【期刊,年、卷、期、起止页码】:Acta Cryst. (2008). A64, 316-320 【全文链接】: http://dx.doi.org/10.1107/S0108767307068262
2, 【作者】:N. F. Mott 【题名】:Conduction in non-crystalline systems XI. The on-state of the threshold switch 【期刊,年、卷、期、起止页码】:Philosophical Magazine, Volume 32, Issue 1 July 1975 , pages 159 - 171 【全文链接】: http://dx.doi.org/10.1080/14786437508222812