https://books.google.fr/books?id=COEeYTcJ_UIC&pg=PA49&dq=Jean-Fran%C3%A7ois+Pradeau&hl=fr&sa=X&ei=fYilVIOOMMLN7Qb964CADw&ved=0CEUQ6AEwBQ#v=onepage&q=Jean-Fran%C3%A7ois%20Pradeau&f=false
https://books.google.fr/books?id=afgozHK1B8AC&printsec=frontcover&dq=Jean-Fran%C3%A7ois+Pradeau&hl=fr&sa=X&ei=fYilVIOOMMLN7Qb964CADw&ved=0CCkQ6AEwAA#v=onepage&q=Jean-Fran%C3%A7ois%20Pradeau&f=false
https://books.google.fr/books?id=afgozHK1B8AC&printsec=frontcover&dq=Jean-Fran%C3%A7ois+Pradeau&hl=fr&sa=X&ei=fYilVIOOMMLN7Qb964CADw&ved=0CCkQ6AEwAA#v=onepage&q=Jean-Fran%C3%A7ois%20Pradeau&f=false