@inbook {heckman1991minimax, title = {Minimax Bayes Estimation, Penalized Likelihood Methods, and Restricted Minimax Estimation}, booktitle = {Nonparametric Functional Estimation and Related Topics}, year = {1991}, pages = {339{\textendash}346}, publisher = {Springer}, organization = {Springer}, author = {Heckman, Nancy E} }