http://www.aerostories.org/~aerobiblio/article789.html
http://www.aerostories.org/~aerobiblio/article1549.html
http://www.aerostories.org/~aerobiblio/article1827.html
http://fha-assos.org/realisations/expoaero/doc/commandelivreaero.pdf
http://www.ffvv.org/publication.php