What is the minimum CHSH score certifying that a state resembles the singlet?

Xavier Valcarce, Pavel Sekatski, Davide Orsucci, Enky Oudot, Jean-Daniel Bancal, Nicolas Sangouard. What is the minimum CHSH score certifying that a state resembles the singlet?. Quantum, 4:246, 2020. [doi]

Abstract

Abstract is missing.