D. Bailey, and V. Powers. Algorithmic and Quantitative Aspects of Real Algebraic Geometry in Mathematics and Computer Science, volume 60 of DIMACS Series in Discrete Mathematics and Theoretical Computer Science, page 13-21. DIMACS/AMS, (2001)
H. Bailey. Discrete Mathematics in the Schools, volume 36 of DIMACS Series in Discrete Mathematics and Theoretical Computer Science, page 311-316. DIMACS/AMS, (1992)