K. Moritsugu, O. Miyashita, and A. Kidera, "Temperature Dependence of Vibrational Energy Transfer in a Protein Molecule", J. Phys. Chem. B 107, 3309 (2003); Y. Mizutani and T. Kitagawa, "Ultrafast Structural Relaxation of Myoglobin Following Photodissociation of Carbon Monoxide Probed by Time-Resolved Resonance Raman Spectroscopy", ibid. 105, 10992 (2001); J. E. Straub and M. Karplus, "Molecular dynamics study of the photodissociation of carbon monoxide from myoglobin: ligand dynamics in the first 10 ps", Chem. Phys. 158, 221 (1991).