6.5 Numerical methods for differential equations A Rich Differential Equation for Computer Demonstrations, Bernard W. Banks, 21:1, 1990, 45-50, 6.4, 9.6 Newton's Principia and Inverse-Square Orbits, N. Nauenberg, 25:3, 1994, 212-221, 0.5, 2.2, 6.4 Computers, Lies, and the Fishing Season, Robert L. Borrelli and Courtney S. Coleman, 25:5, 1994, 401-412, 6.2, 6.4