@article{NUMA_1991__59_8_133543,
     author = {J.F.B.M. Kraaijevanger and J. Schneid},
     title = {On the unique solvability of the {Runge-Kutta} equations.},
     journal = {Numerische Mathematik},
     pages = {129--158},
     year = {1991},
     volume = {59},
     number = {8},
     zbl = {0703.65038},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1991__59_8_133543/}
}