Статья 2285 H.L. Margaryan N.H. Hakobyan D. L. Hovhannisyan V. K. Abrahamyan D. K. Pokhsraryan S. R. Manucharyan Molecular Crystals and Liquid Crystals v. 561 p. 170–176 2012 http://www.tandfonline.com/loi/gmcl20