@article{10_4064_fm218_1_1,
     author = {Bronis{\l}aw Wajnryb and Agnieszka Wi\'sniowska-Wajnryb},
     title = {Non-standard automorphisms of
 branched coverings of a disk and a sphere},
     journal = {Fundamenta Mathematicae},
     pages = {1--11},
     publisher = {mathdoc},
     volume = {218},
     number = {1},
     year = {2012},
     doi = {10.4064/fm218-1-1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm218-1-1/}
}