1. Cubic-quartic optical soliton perturbation with Lakshmanan-Porsezian-Daniel model by semi-inverse variational principle.
   Biswas A., Edoki J., Guggilla P., Khan S., Alzahrani A. K. and Belic M. R. 2021. Ukr.J.Phys.Opt. 22: 123 – 127.
   doi: 10.3116/16091833/22/3/123/2021


2. Infrared and visible image fusion based on empirical curvelet transform and phase congruency.
   Defa Hu and Hailiang Shi. 2021. Ukr.J.Phys.Opt. 22: 128 – 137. doi: 10.3116/16091833/22/3/128/2021


3. Simultaneous acousto-optic diffractions by two lobes of a shaped phased-array transducer.
   Illienko M. O., Pilgun Yu. V. and Smirnov Ye. M. 2021. Ukr.J.Phys.Opt. 22: 138 – 150.
   doi: 10.3116/16091833/22/3/138/2021


4. Liquid crystal textures and optical characterization of a dye-doped nematic for generating vector beams.
   Nastishin Yu. A., Dudok T., Savaryn V., Kostyrko M., Vasylkiv Yu., Hrabchak V., Ryzhov Ye. and Vlokh R. 2021. Ukr.J.Phys.Opt. 22: 151 – 164.
   doi: 10.3116/16091833/22/3/151/2021