@article{NUMA_1986__49_133131,
     author = {I. Babuska and W. Gui},
     title = {The h, p and h-p {Versions} of the {Finite} {Element} {Method} in 1 {Dimension.} {Part} {I.} {The} {Error} {Analysis} of the {p-Version.}},
     journal = {Numerische Mathematik},
     pages = {577--612},
     publisher = {mathdoc},
     volume = {49},
     year = {1986},
     zbl = {0614.65088},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1986__49_133131/}
}