@article{KYB_2003__39_5_a2,
     author = {Mart{\'\i}nez, J. and Cordero, P. and Guti\'errez, G. and Guzm\'an, I. P. de},
     title = {Restricted ideals and the groupability property. {Tools} for temporal reasoning},
     journal = {Kybernetika},
     pages = {[521]},
     publisher = {mathdoc},
     volume = {39},
     number = {5},
     year = {2003},
     mrnumber = {2042339},
     zbl = {1249.03004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/KYB_2003__39_5_a2/}
}