Bondar, M. V., Przhonska, O. V., Kachkovsky, O. D., Frazer, A., Morales, A. R. and Belfield, K. D. (2018) “New Fluorene-Based Fluorescent Probe with Efficient Two-Photon Absorption”, Ukrainian Journal of Physics, 58(8), p. 748. doi: 10.15407/ujpe58.08.0748.