@article{01693767,
title = {Sharp },
journal = {Portugaliae Mathematica. Nova S\'erie},
volume = {58},
year = {2001},
pages = {77-120},
zbl = {1008.35039},
language = {en},
url = {http://dml.mathdoc.fr/item/01693767}
}
Goatin, P.; LeFloch, P.G. Sharp . Portugaliae Mathematica. Nova Série, Tome 58 (2001) pp. 77-120. http://gdmltest.u-ga.fr/item/01693767/