@article{701637,
     title = {Integration of a density and the fiber integral for regular Lie algebroids in a nonorientable case},
     booktitle = {Proceedings of the 18th Winter School "Geometry and Physics"},
     series = {GDML\_Books},
     publisher = {Circolo Matematico di Palermo},
     address = {Palermo},
     year = {1999},
     pages = {189-199},
     mrnumber = {MR1692270},
     zbl = {0977.57034},
     url = {http://dml.mathdoc.fr/item/701637}
}

Urbański, Tomasz. Integration of a density and the fiber integral for regular Lie algebroids in a nonorientable case, dans Proceedings of the 18th Winter School "Geometry and Physics", GDML_Books,  (1999), pp. 189-199. http://gdmltest.u-ga.fr/item/701637/