@article{NUMA_1969__13_131896,
     author = {J.H. VERNER},
     title = {The {Order} of {Some} {Implicit} {Runge-Kutta} {Methods.}},
     journal = {Numerische Mathematik},
     pages = {14--23},
     publisher = {mathdoc},
     volume = {13},
     year = {1969},
     zbl = {0172.42602},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1969__13_131896/}
}