Probing of higher excited states of merocyanine derivatives of azaazulene and indandione by fluorescence excitation anisotropy spectra - A. P. Naumenko; V. Borysuk; M. S. Iakhnenko; V. O. Guba¬nov; Y. L. Slominskii; O. D. Kachkovsky (Ukrainian journal of physics, 2020)