Linear and quadratic GUP, Liouville theorem, cosmological constant, and Brick Wall entropy Elias C. Vagenas, Ahmed Farag Ali, Mohammed Hemeda and Hassan Alshal Eur. Phys. J. C, 79 5 (2019) 398 Published online: 09 May 2019 DOI: 10.1140/epjc/s10052-019-6908-z