1. Proof from THE BOOK;Aigner,2001
2. Is there a circle that passes through a given number of lattice points?;Maehara;European J. Combin.,1998
3. An Introduction to the Theory of Numbers;Niven,1972
4. On a problem of Steinhaus on lattice points;Schoenberg;Amer. Math. Monthly,1979
5. I.J. Schoenberg, Mathematical Time Exposures, MAA, 1982