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