Extracting p-values for fixed effects from nlme/lme4 output in R

Understanding Confidence Intervals for GLS Predicted Values in NLME Models: A Practical Guide to Calculating Standard Errors and Prediction Intervals with R

Between-By-Within-Subject ANOVA Interaction Contrasts in R using car, lme, and ez Packages

Understanding Generalized Linear Models (GLMs) in R with nlme Package for Prediction and Analysis