@article{PORMA_1996__53_2_47549,
     author = {Silva, Fernando C.},
     title = {Integral representations of graphs.},
     journal = {Portugaliae mathematica},
     pages = {137--142},
     publisher = {mathdoc},
     volume = {53},
     number = {2},
     year = {1996},
     zbl = {0853.05076},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1996__53_2_47549/}
}