Mathematics Magazine, Vol. 66, No. 1. (1993), pp. 20-22.
Mathematics Magazine, Vol. 57, No. 4. (1984), pp. 195-208.
Mathematics Magazine, Vol. 65, No. 1. (1992), pp. 36-37.
Nature, Vol. 415, No. 6875. (28 February 2002), pp. 1026-1029.
(31 Jan 2002)
(6 Mar 2007)
(16 Nov 2007)
Discrete Appl. Math., Vol. 156, No. 5. (2008), pp. 770-779.
(20 Oct 2005)
Discrete Math., Vol. 1, No. 4. (1972), pp. 333-350.
(27 Jan 2006)
American Mathematical Monthly, Vol. 113, No. 7. (27 August 2006), pp. 598-610.
(11 Dec 2001)
Fibonacci Quart., Vol. 38, No. 5. (2000), pp. 408-419.
J. Combin. Theory Ser. A, Vol. 44, No. 2. (1987), pp. 267-273.
(16 Jan 2006)
Discrete Mathematics, Vol. 204, No. 1-3. (6 June 1999), pp. 73-112.
J. Integer Seq., Vol. 3, No. 1. (2000), article 00.1.6.
Discrete Math., Vol. 217, No. 1--3. (2000), pp. 367-409.
J. Combin. Theory Ser. A, Vol. 40, No. 2. (1985), pp. 248-264.
Advances in Applied Mathematics, Vol. 29, No. 3. (October 2002), pp. 345-357.
by Sen-Peng
Eu, Shu-Chung
Liu, Yeong-Nan
Yeh
(6 Feb 2006)
(17 November 2005)