@article{00223004, title = {<title-group xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"><article-title xml:lang="en"><math><mi>$\mathbb{R}$</mi></math>-trees and normalization of pseudogroups.</article-title></title-group>}, journal = {Experimental Mathematics}, volume = {1}, year = {1992}, pages = {95-114}, doi = {10.1080/10586458.1992.10504251}, zbl = {0772.58068}, language = {en}, url = {http://dml.mathdoc.fr/item/00223004} }
Rimlinger, Frank.. Experimental Mathematics, Tome 1 (1992) pp. 95-114. doi : 10.1080/10586458.1992.10504251. http://gdmltest.u-ga.fr/item/00223004/ -trees and normalization of pseudogroups.