D. M. Higdon James E. Bowsher Valen E. Johnson T. G. Turkington David R. Gilland Ronald J. Jaszczak Fully Bayesian Estimation of Gibbs Hyperparameters for Emission Computed Tomography Data. 516-526 1997 16 IEEE Trans. Med. Imaging 5 db/journals/tmi/tmi16.html#HigdonBJTGJ97 http://dx.doi.org/10.1109/42.640741