@article{10_4153_CJM_1999_002_0,
     author = {Chacron, M. and Tignol, J.-P. and Wadsworth, A. R.},
     title = {Tractable {Fields}},
     journal = {Canadian journal of mathematics},
     pages = {10--25},
     year = {1999},
     volume = {51},
     number = {1},
     doi = {10.4153/CJM-1999-002-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1999-002-0/}
}