TY  - JOUR
AU  - Yan Xu
TI  - On the five-point theorems due to Lappan
JO  - Annales Polonici Mathematici
PY  - 2011
SP  - 227
EP  - 235
VL  - 101
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/ap101-3-3/
DO  - 10.4064/ap101-3-3
LA  - en
ID  - 10_4064_ap101_3_3
ER  -