academic article

• Models for multi-environment yield trials with fixed and random block effects and homogeneous and heterogeneous residual variances.  Journal of Agriculture of the University of Puerto Rico.  91:117-131. 2007
• Error Variation in Multienvironment Peanut Trials: Within-Trial Spatial Correlation and Between-Trial Heterogeneity.  Crop Science .  45:1927-1933. 2005