ON SHANNON AND ZIPF–MANDELBROT ENTROPIES AND RELATED RESULTS Статья Khalid S., Pečarić Ð., Pečarić J. Journal of Inequalities and Applications. Springer International Publishing. Том 2019. 2019.
OSCILLATION THEOREMS FOR THIRD ORDER NONLINEAR DELAY DIFFERENCE EQUATIONS Статья Vidhyaa K.S., Dharuman C., Thandapani E., Pinelas S. Mathematica Bohemica. Akademie ved Ceske Republiky. Том 144. 2019. С. 25-37