1. T. Chow, private communication.
2. C.L. Dodgson, Condensation of determinants, Proc. Roy. Soc. London 15 (1866), 150-155.
3. L. Lováisz, Combinatorial Problems and Exercises, North-Holland, Amsterdam, 1979.
4. J.G. Oxley, Matroid Theory, Oxford University Press, New York, 1992.
5. R.P. Stanley, Spanning trees and a conjecture of Kontsevich, Ann. Combin. 2 (1998) 351-363.
6. D. Zeilberger, Dodgson's determinant-evaluation rule proved by two-timing men and women,
Electron. J. Combin. 4(2) R22 (1997), 2pp.