@article{SIGMA_2013_9_a26,
     author = {Darryl D. Holm and Rossen I. Ivanov},
     title = {$G${-Strands} and {Peakon} {Collisions} on $\rm{Diff}\,(\mathbb{R})$},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2013},
     volume = {9},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2013_9_a26/}
}