@article{PORMA_1988__45_3_115633,
     author = {Cordovil, Ra\'ul and Dias da Silva, J.A. and Fonseca, Am\'elia},
     title = {On the notion of transversal of a sum of matroids},
     journal = {Portugaliae mathematica},
     pages = {317--325},
     publisher = {mathdoc},
     volume = {45},
     number = {3},
     year = {1988},
     mrnumber = {0973165},
     zbl = {0671.05020},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1988__45_3_115633/}
}