Un super document (Merci a Yehoudi)
http://books.google.fr/books?id=YwsRAAAAIAAJ&pg=RA2-PA307&lpg=RA2-PA307&dq=poissons+jourdain&source=web&ots=O6sBIVrfRR&sig=RkYfoIs1BFQHIUfqyvgo8e2kdJc&hl=fr&sa=X&oi=book_result&resnum=2&ct=result#v=onepage&q=poissons%20jourdain&f=false