@article{NUMA_1973__21_132237,
     author = {Rolf Jeltsch},
     title = {Integration of {Iterated} {Integrals} by {Multistep} {Methods.}},
     journal = {Numerische Mathematik},
     pages = {303--316},
     publisher = {mathdoc},
     volume = {21},
     year = {1973},
     zbl = {0255.65013},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1973__21_132237/}
}