LINEAR AND THIRD-ORDER NONLINEAR OPTICAL PROPERTIES OF CHALCOGENOPYRYLIUM-TERMINATED HEPTAMETHINE DYES WITH RIGID, BULKY SUBSTITUENTS ArticleGetmanenko Y.A., Allen T.G., Kim H., Hales J.M., Sandhu B., Fonari M.S., Suponitsky K.Y., Zhang Y., Khrustalev V.N., Matichak J.D., Timofeeva T.V., Barlow S., Chi S.-H., Perry J.W., Marder S.R.Advanced Functional Materials. Том 28. 2018.