“…Magdalev introduced a significant contribution to the study of the elasticity of the crystalline lattices of polymers, especially polyimides. [26][27][28] Their study of a series of polyimides with a similar chemical structure, in fact, offered a Downloaded by [Florida International University] at 07:49 26 December 2014 unique physical method of determination of the force constants of deformation of complex polyatomic groups. [28] A cycle of interesting studies have been undertaken by B. M.Ginzburg et al on lyotropic polymer liquid crystals.…”