@article{10_4064_fm198_1_3,
     author = {Su Gao and Steve Jackson and Vincent Kieftenbeld},
     title = {A classification of ordinals up to {Borel} isomorphism},
     journal = {Fundamenta Mathematicae},
     pages = {61--76},
     publisher = {mathdoc},
     volume = {198},
     number = {1},
     year = {2008},
     doi = {10.4064/fm198-1-3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm198-1-3/}
}