@article{Zatorsky_Semenchuk_2014, title={Calculation algorithm of rational estimations of recurrence periodical fourth order fraction}, volume={6}, url={https://journals.pnu.edu.ua/index.php/cmp/article/view/1332}, DOI={10.15330/cmp.6.1.32-43}, abstractNote={<p>Recurrence fourth order fractions are studied. Connection with algebraic fourth order equations is established. Calculation algorithms of rational contractions of such fractions are built.</p>}, number={1}, journal={Carpathian Mathematical Publications}, author={Zatorsky, R.A. and Semenchuk, A.V.}, year={2014}, month={Jul.}, pages={32–43} }