title: Probing the barrier for internal rotation of the retinal chromophore.
authors: Department of Physics and Astronomy, Aarhus University, Aarhus, Denmark.
authors: Yoni
authors: Y
authors: Toker
authors: Annette
authors: A
authors: Svendsen
authors: Anastasia V
authors: AV
authors: Bochenkova
authors: Lars H
authors: LH
authors: Andersen