Observational constraints on Barrow holographic dark energy Fotios K. Anagnostopoulos, Spyros Basilakos and Emmanuel N. Saridakis Eur. Phys. J. C, 80 9 (2020) 826 Published online: 05 September 2020 DOI: 10.1140/epjc/s10052-020-8360-5