@article{MAN_1984__266_163841,
     author = {A.G. O'Farrell and K.J. Preskenis and D. Walsh},
     title = {Polynomial {Aprroximation} on {Graphs.}},
     journal = {Mathematische Annalen},
     pages = {73--82},
     publisher = {mathdoc},
     volume = {266},
     year = {1984},
     url = {http://geodesic.mathdoc.fr/item/MAN_1984__266_163841/}
}