Quartets and the current-phase structure of a double quantum dot superconducting bijunction at equilibriumDenis Feinberg, Thibaut Jonckheere, Jérôme Rech, Thierry Martin, Benoît Douçot and Régis MélinEur. Phys. J. B, 88 4 (2015) 99DOI: https://doi.org/10.1140/epjb/e2015-50849-3