@Book{BDG20190135139, title = "Abr\'{e}g\'{e} des \'{e}l\'{e}mens de math\'{e}matiques", author = "Rivard, Dominique-Fran\c{c}ois, 1697-1778", URL = "http://biblioteca.galiciana.gal/es/consulta/registro.do?id=577236", year = "1761", }