@article{article_552503, title={The First Seven Perfect Numbers and Three Types of Amicable Numbers in a Manuscript on Elementary Number Theory by Ibn Fallûs}, journal={Erdem}, volume={5}, pages={467–484}, year={1988}, author={Brentjes, Sonja}, abstract={-}, number={11}, publisher={Atatürk Kültür Merkezi Başkanlığı}