@article{MS2_1973__33_166337,
     author = {James Li-Ming Wang},
     title = {An {Approximate} {Taylor's} {Theorem} for {R(X).}},
     journal = {Mathematica Scandinavica},
     pages = {343--358},
     publisher = {mathdoc},
     volume = {33},
     year = {1973},
     zbl = {0284.46036},
     url = {http://geodesic.mathdoc.fr/item/MS2_1973__33_166337/}
}