@article{PM_2008_2008_1_a4,
     author = {Jarboui, N. and  Jerbi, A.},
     title = {Pullbacks and universal catenarity },
     journal = {Publicacions matem\`atiques},
     pages = {365-375},
     publisher = {mathdoc},
     volume = {52},
     number = {2},
     year = {2008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PM_2008_2008_1_a4/}
}