@article{AM2_1996__52_1-2_137659,
     author = {Joachim Domsta},
     title = {A limit formula for regular iteration groups.},
     journal = {Aequationes mathematicae},
     pages = {116--134},
     publisher = {mathdoc},
     volume = {52},
     number = {1-2},
     year = {1996},
     zbl = {0860.26001},
     url = {http://geodesic.mathdoc.fr/item/AM2_1996__52_1-2_137659/}
}