Energy-dependent quenching of chlorophyll a fluorescence: Effect of pH on stationary fluorescence and picosecond-relaxation kinetics in thylakoid membranes and Photosystem II preparations Krieger, A.; Moya, I.; Weis, E. Biochimica et Biophysica Acta 1102(2): 167-176 1992 https://eurekamag.com/research/008/607/008607099.php