References
- J. A. Benner, Problem E 275, American Mathematical Monthly 44 (1937) 245.
- M. S. Klamkin, Problem E 963, American Mathematical Monthly 58 (1951) 260.
- J. L. Lewis, A computational solution to the snowplow problem, ACM SIGCSE Bulletin 18 (1986) 9–12.
- L. A. Ringenberg, Solution E 963, American Mathematical Monthly 59 (1952) 42.