“ELECTRONIC STRUCTURE AND ABSORPTION SPECTRA OF CYANINE DYES DERIVED FROM TETRAZOLOISOINDOLES: UDC 547.759.4”. Bulletin of the Taras Shevchenko National University of Kyiv. Chemistry, vol. 49, no. 1, Nov. 2013, pp. 66-68, https://chemistry.bulletin.knu.ua/article/view/8475.