@article{EXMA_1992__1_2_225817,
     author = {Rimlinger, Frank},
     title = {-trees and normalization of pseudogroups.},
     journal = {Experimental mathematics},
     pages = {95--114},
     publisher = {mathdoc},
     volume = {1},
     number = {2},
     year = {1992},
     zbl = {0772.58068},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EXMA_1992__1_2_225817/}
}