"Pablo  Nieto,David M?ller,Alexander Sheldrick,Alan G?nther,Mitsuhiko Miyazaki,Otto Dopfer","Effect of alkali ions on optical properties of flavins: vibronic spectra of cryogenic M+lumichrome ions (M = Li-Cs) in the gas phase",,"Physical chemistry, chemical physics : PCCP",,"Vol. 20","No. 34","pp. 22148?22158",2018,Sept.