TY - GEN AU - Björkman,O AU - Demmig,B TI - Photon yield of O2 evolution and chlorophyll fluorescence characteristics at 77 K among vascular plants of diverse origins SN - 0032-0935 PY - 2013///1118 N1 - Publication Type: Journal Article UR - https://doi.org/10.1007/BF00402983 ER -