5.3.4 Special functions The World's Biggest Taco, David D. Bleecker and Lawrence J. Wallen, 29:1, 1998, 2-12, 5.2.7, 9.5 A Generalized Logarithm for Exponential-Linear Equations, Dan Kalman, 32:1, 2001, 2-14 Tugging a Barge with Hyperbolic Functions, William B. Gearhart and Harris S. Shultz, 34:1, 2003, 42-49, 5.3.3, 6.4 Sums of Harmonic-Type Series, James Lesko, 35:3, 2004, 171-182, 5.4.2 Projectile Motion with Resistance and the Lambert W Function, Edward W. Packel and David S. Yuen, 35:5, 2004, 337-350, 6.2, 9.10 An Exceptional Exponential Function, Branko Curgus, 37:5, 2006, 344-354, 5.1.4, 5.3.2 Epidemic Models for SARS and Measles, Edward Rozema, 38:4, 2007, 246-259, 6.1, 9.10