The Ran–Reurings fixed point theorem without partial order: A simple proof
Crossref DOI link: https://doi.org/10.1007/s11784-015-0218-3
Published Online: 2015-02-14
Published Print: 2014-12
Update policy: https://doi.org/10.1007/springer_crossmark_policy
Ben-El-Mechaiekh, Hichem
Text and Data Mining valid from 2014-12-01