@article{NUMA_1964__6_131594,
     author = {H.E. SALZER},
     title = {Divided {Differences} for {Functions} of {Two} {Variables} for {Irregularly} {Spaced} {Arguments.}},
     journal = {Numerische Mathematik},
     pages = {68--77},
     publisher = {mathdoc},
     volume = {6},
     year = {1964},
     zbl = {0119.33103},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1964__6_131594/}
}