Source: https://apprendre.auf.org/wp-content/opera/13-BF-References-et-biblio-RPT-2014/Confection%20et%20r%C3%A9alisation%20d%E2%80%99un%20r%C3%A9f%C3%A9rentiel%20d%E2%80%99%C3%A9valuation.pdf