@article{PORMA_1985__43_4_114540,
     author = {Vila, J.},
     title = {Comment on: },
     journal = {Portugaliae mathematica},
     pages = {495--498},
     publisher = {mathdoc},
     volume = {43},
     number = {4},
     year = {1985},
     mrnumber = {0911455},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1985__43_4_114540/}
}