Elliot Taffet and Gregory D. Scholes
https://doi.org/10.1016/j.chemphys.2017.12.008
Chemical Physics, 515, 757-767.
The Ag(+) state falls below 3Ag(-) at carotenoid-relevant conjugation lengths

Elliot Taffet and Gregory D. Scholes
https://doi.org/10.1016/j.chemphys.2017.12.008
Chemical Physics, 515, 757-767.