Naturalness implications within the two-real-scalar-singlet beyond the SM Jamal Ou Aali, Bouzid Manaut, Larbi Rahili and Souad Semlali Eur. Phys. J. C, 81 11 (2021) 1045 Published online: 29 November 2021 DOI: 10.1140/epjc/s10052-021-09839-6