Yilmaz, Nur Şeyma, Andrzej Włoch, Engin Özkan, and Dominik Strzałka. 2023. “On Doubled and Quadrupled Fibonacci Type Sequences”. Annales Mathematicae Silesianae 38 (2):336-50. https://trrest.vot.pl/ojsus/index.php/AMSIL/article/view/16395.