@article {1987|1820, title = {Carbon dioxide and oxygen linkage in human hemoglobin tetramers}, journal = {J. Mol. Biol.}, volume = {196}, number = {4}, year = {1987}, month = {aug}, pages = {927{\textendash}934}, author = {Doyle, M L and Di Cera, E and Robert, C H and Gill, S J} } @article {1986|1602, title = {Cooperative free energies for nested allosteric models as applied to human hemoglobin}, journal = {Biophys. J.}, volume = {50}, number = {4}, year = {1986}, month = {oct}, pages = {747{\textendash}752}, author = {Gill, S J and Charles H. Robert and Coletta, M and Di Cera, E and Brunori, M} }