@article{NUMA_1969__13_131901,
     author = {D. EHRESMANN},
     title = {Zur {Absch\"atzung} des {Bestapproximationsfehlers} bei der {Approximation} differenzierbarer {Funktionen} durch {Polynome.}},
     journal = {Numerische Mathematik},
     pages = {94--100},
     publisher = {mathdoc},
     volume = {13},
     year = {1969},
     zbl = {0172.34301},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1969__13_131901/}
}