@article{10_4064_cm_25_1_99_102,
     author = {Hiroshi Haruki},
     title = {On a metrical theorem in geometry of circles},
     journal = {Colloquium Mathematicum},
     pages = {99--102},
     publisher = {mathdoc},
     volume = {25},
     number = {1},
     year = {1972},
     doi = {10.4064/cm-25-1-99-102},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-25-1-99-102/}
}