@article{10_4064_ap101_3_3,
     author = {Yan Xu},
     title = {On the five-point theorems due to {Lappan}},
     journal = {Annales Polonici Mathematici},
     pages = {227--235},
     publisher = {mathdoc},
     volume = {101},
     number = {3},
     year = {2011},
     doi = {10.4064/ap101-3-3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap101-3-3/}
}