REFERENCES
- John Beebee, Examples of infinite, incongruent exact covers, Amer. Math. Monthly, 95 (1988) 121–123.
- Sherman K. Stein, Unions of arithmetic sequences, Math. Annalen, 134 (1958) 282–294.
- William J. LeVeque, Fundamentals of Number Theory, Addison-Wesley, Reading, MA, 1977.
- Hugh M. Edgar, A First Course in Number Theory, Wadsworth, Belmont, CA, 1988.
- R. K. Guy, Unsolved Problems in Number Theory (Sections F13, F14), Springer, 1981.