https://cran.case.edu/web/packages/rsem/index.html
CRAN: Package rsem
A robust procedure is implemented to estimate means and covariance matrix of multiple variables with missing data using Huber weight and then to estimate a...
cranpackagersem
https://rededucadoresdelmu.wixsite.com/plataforma
RSEM | Red Social de Educadores del Mundo
red socialrsemdeeducadoresmundo