@article{AFM_2004_29_2_a7,
     author = {Rich Stankewitz and Toshiyuki Sugawa and Hiroki Sumi},
     title = {Some counterexamples in dynamics of rational semigroups},
     journal = {Annales Fennici Mathematici},
     pages = {357--366},
     publisher = {mathdoc},
     volume = {29},
     number = {2},
     year = {2004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AFM_2004_29_2_a7/}
}