Source: http://www.univ-bejaia.dz/jspui/bitstream/123456789/10057/1/Etude%20d%E2%80%99un%20syst%C3%A8me%20%C3%A9olien%20connect%C3%A9%20au%20r%C3%A9seau%2C%20bas%C3%A9%20sur%20une%20GAS%20auto-excit%C3%A9e.pdf