@article{CG_1991___10-11_135_0,
     author = {Leguy, Bernard},
     title = {Drawing tree structures with {GWEZ}},
     journal = {Cahiers GUTenberg},
     pages = {135--146},
     publisher = {Association GUTenberg},
     number = {10-11},
     year = {1991},
     language = {en},
     url = {http://archive.numdam.org/item/CG_1991___10-11_135_0/}
}