1. Simultaneous diophantine approximation;Cassels;J. London Math. Soc.,1955
2. Sequences of points on a circle;de Bruijn;Indag. Math.,1949
3. Old and new problems and results in combinatorial number theory;Erdös,1980
4. Uniform distribution of sequences;Kuipers,1974
5. Diophantine approximations;Niven,1963