@article{CMUC_1978__19_4_a8,
     author = {Lee, Cheng Ming},
     title = {An existence theorem via an intuitive idea and fixed-point theorems},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {715--725},
     publisher = {mathdoc},
     volume = {19},
     number = {4},
     year = {1978},
     mrnumber = {518183},
     zbl = {0404.54038},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1978__19_4_a8/}
}