@article{JLT_2016_26_4_JLT_2016_26_4_a7,
     author = {G. Bogfjellmo and A. Schmeding},
     title = {The {Tame} {Butcher} {Group}},
     journal = {Journal of Lie theory},
     pages = {1107--1144},
     year = {2016},
     volume = {26},
     number = {4},
     url = {http://geodesic.mathdoc.fr/item/JLT_2016_26_4_JLT_2016_26_4_a7/}
}