@article{10_1017_S001708950000094X,
     author = {Kessler, Peter},
     title = {On a theorem of {Iseki}},
     journal = {Glasgow mathematical journal},
     pages = {110--113},
     year = {1970},
     volume = {11},
     number = {2},
     doi = {10.1017/S001708950000094X},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S001708950000094X/}
}