@article{10_4064_fm_138_3_219_224,
     author = {Xingru Zhang},
     title = {Nonintegral boundary-slopes exist},
     journal = {Fundamenta Mathematicae},
     pages = {219--224},
     publisher = {mathdoc},
     volume = {138},
     number = {3},
     year = {1991},
     doi = {10.4064/fm-138-3-219-224},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-138-3-219-224/}
}