@article{10_4064_ap_35_1_77_98,
     author = {Shinji Yamashita},
     title = {Cluster sets of set-mappings},
     journal = {Annales Polonici Mathematici},
     pages = {77--98},
     publisher = {mathdoc},
     volume = {35},
     number = {1},
     year = {1977},
     doi = {10.4064/ap-35-1-77-98},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-35-1-77-98/}
}