@article{10_4064_fm_138_3_205_217,
     author = {Grzegorz \'Swi\k{a}tek},
     title = {Circle homeomorphisms with flat critical points},
     journal = {Fundamenta Mathematicae},
     pages = {205--217},
     publisher = {mathdoc},
     volume = {138},
     number = {3},
     year = {1991},
     doi = {10.4064/fm-138-3-205-217},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-138-3-205-217/}
}