@article{01975345,
title = {Path formulation for a modal family.},
journal = {Portugaliae Mathematica. Nova S\'erie},
volume = {58},
year = {2001},
pages = {407-424},
zbl = {1029.37029},
language = {en},
url = {http://dml.mathdoc.fr/item/01975345}
}
Aguiar, M.; Castro, S.; Labouriau, I. Path formulation for a modal family.. Portugaliae Mathematica. Nova Série, Tome 58 (2001) pp. 407-424. http://gdmltest.u-ga.fr/item/01975345/