Artykuł jest również dostępny w wersji elektronicznej (konsorcjum lub zakup). Available online 4 February 2020. This work started during the Friendly Workshop on Diophantine Equations and Related Problems (Bursa Uludağ University, Bursa, July 6–8, 2019). This work-shop was partially supported by TÜBİTAK (the Scientific and Technological Research Council of Turkey) |