Gavrilko, T., V. Nechytaylo, L. Viduta, and J. Baran. “Optical Properties and Stability of Bilayer Rubrene-Alq3 Films Fabricated by Vacuum Deposition”. Ukrainian Journal of Physics, vol. 63, no. 4, June 2018, p. 362, doi:10.15407/ujpe63.4.362.