@article{IJAMCS_2010_20_4_a7,
     author = {Han, S. E.},
     title = {Ultra regular covering space and its automorphism group},
     journal = {International Journal of Applied Mathematics and Computer Science},
     pages = {699--710},
     publisher = {mathdoc},
     volume = {20},
     number = {4},
     year = {2010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IJAMCS_2010_20_4_a7/}
}