@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/