1. Temperature dependences of optical indicatrix and thermal expansion parameters of TlIn(S_1–xSe_x)₂ solid solutions (x = 0, 0.02 and 0.06)
   Say A., Martynyuk-Lototska I., Mys O., Adamenko D., Kostyrko M., Gomonnai O. and Vlokh R.
   2020. Ukr.J.Phys.Opt. 21 :57 – 64.
   doi: 10.3116/16091833/21/2/57/2020


2. Reconstruction of spectral reflectance based on mixed weighting and local optimization
   Leihong Zhang, Runchu Xu, Shuangquan Lu, Liuhua Yang, Xiao Yuan, Kaiming Wang and Dawei Zhang
   2020. Ukr.J.Phys.Opt. 21 :65 – 83.
   doi: 10.3116/16091833/21/2/65/2020


3. Thermally activated spectroscopy of optical absorption in Bi₁₂SiO₂₀ crystals
   Panchenko T. and Karpova L. 2020. Ukr.J.Phys.Opt. 21 :84 – 92.
   doi: 10.3116/16091833/21/2/84/2020


4. Analysis of multiband graphene-based terahertz square-ring fractal antenna
   Zinelabiddine Mezache 2020. Ukr.J.Phys.Opt. 21 :93 – 102.
   doi: 10.3116/16091833/21/2/93/2020


5. Photoluminescence spectra of polycrystalline ZnSe in different experimental geometries
   Abbasov I., Musayev M., Huseynov J., Kostyrko M., Babayev S., Eyyubov G. and Aliyeva S.
   2020. Ukr.J.Phys.Opt. 21 :103 – 114.
   doi: 10.3116/16091833/21/2/103/2020