@article{PORMA_2001__58_4_50514,
     author = {Aguiar, M. and Castro, S. and Labouriau, I.},
     title = {Path formulation for a modal family.},
     journal = {Portugaliae mathematica},
     pages = {407--424},
     publisher = {mathdoc},
     volume = {58},
     number = {4},
     year = {2001},
     zbl = {1029.37029},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_2001__58_4_50514/}
}