@article{GDZPPN002039583,
title = {Universal coverings of PL-mainfolds via coloured graphs.},
journal = {Aequationes mathematicae},
volume = {44},
year = {1992},
pages = {60-71},
zbl = {0764.57004},
url = {http://dml.mathdoc.fr/item/GDZPPN002039583}
}
Costa, Antonio; Grasselli, Luigi. Universal coverings of PL-mainfolds via coloured graphs.. Aequationes mathematicae, Tome 44 (1992) pp. 60-71. http://gdmltest.u-ga.fr/item/GDZPPN002039583/