R.K. Guy and R.E. Woodrow, pub. by The Mathematical Association of America, 1994, 1992 1991 1990 "A Curious New Result in Switching Theory", The Mathematical Intelligencer 1990; 12: 21–32. 1987 "In Quest of a Pangram", In: A Computer Science Reader, pp 200–20, Edited by EA Weiss, Springer-Verlag, New York, 1986 "Co-Descriptive Strings", (Lee Sallows & Victor L Eijkhout), Mathematical Gazette 1986; 70: 1–10 References External links Recreational mathematicians Mathematics popularizers Combinatorial game theorists Magic squares People from Nijmegen 1944 births Living people