@article{NUMA_1968__11_131836,
     author = {W.B. GRAGG},
     title = {Truncation {Error} {Bounds} for {g-Fractions.}},
     journal = {Numerische Mathematik},
     pages = {370--379},
     year = {1968},
     volume = {11},
     zbl = {0177.43202},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1968__11_131836/}
}