Solution of Problem 69-1, SIAM Review, vol.12, pp.298-300, 1970. ,
The four numbers game, Scripta Math, pp.35-47, 1948. ,
A Problem in Difference Sets, The American Mathematical Monthly, vol.56, issue.8, pp.535-541, 1949. ,
DOI : 10.2307/2305528
Differentiable dynamics, 1971. ,
The design of slowly shrinking labelled squares, Mathematics of Computation, vol.29, issue.129, pp.25-27, 1975. ,
DOI : 10.1090/S0025-5718-1975-0373933-6
Circles of numbers, Glasgow Mathematical Journal, vol.19, issue.02, pp.115-119, 1978. ,
DOI : 10.1017/S0017089500003487
Cycles of differences of integers, Journal of Number Theory, vol.13, issue.2, pp.255-261, 1981. ,
DOI : 10.1016/0022-314X(81)90008-1
A Game with n Numbers, The American Mathematical Monthly, vol.85, issue.3, pp.183-185 ,
DOI : 10.2307/2321059
Iterated Absolute Differences, Mathematics Magazine, vol.52, issue.1, pp.36-40, 1979. ,
DOI : 10.2307/2689974