Ridge Fusion in Statistical Learning. - Bradley S. Price; Charles J. Geyer; Adam J. Rothman (CoRR, 2013)

An Explicit Mean-Covariance Parameterization for Multivariate Response Linear Regression. - Aaron J. Molstad; Guangwei Weng; Charles R. Doss; Adam J. Rothman (J. Comput. Graph. Stat., 2021)