@article{JLT_2003_13_2_JLT_2003_13_2_a2,
     author = {W. Wojtynski},
     title = {Groups of strings},
     journal = {Journal of Lie theory},
     pages = {359--382},
     year = {2003},
     volume = {13},
     number = {2},
     url = {http://geodesic.mathdoc.fr/item/JLT_2003_13_2_JLT_2003_13_2_a2/}
}