@article{GDZPPN001184830, title = {On the unique solvability of the Runge-Kutta equations.}, journal = {Numerische Mathematik}, volume = {59}, year = {1991}, pages = {129-158}, zbl = {0703.65038}, url = {http://dml.mathdoc.fr/item/GDZPPN001184830} }
Kraaijevanger, J.F.B.M.; Schneid, J. On the unique solvability of the Runge-Kutta equations.. Numerische Mathematik, Tome 59 (1991) pp. 129-158. http://gdmltest.u-ga.fr/item/GDZPPN001184830/