ACCA Manuals RS,J,S,D,T & B , Air Conditioning Contractors of America. Washington, DC.

ASHRAE Handbook 1997 Fundamentals, Chapter
32, “Duct Design" formulas 19, 20, 22, 23 through 28 and Table 1. Chapter 6, “Psychrometrics" equations 5, 6, 12, 23, 25, 28, 31, 32, 34, through 38. The American Society of Heating Refrigerating and Air Conditioning Engineers.

ASHRAE Handbook 2000 Systems and
Equipment, Chapter 21, “Air-Cooling and Dehumidifying Coils" equations 37, 38, 39(b) and 40. Chapter 44, “Air-to-Air Energy Recovery" equations 5 and 6. The American Society of Heating Refrigerating and Air Conditioning Engineers.

ASHRAE Toolkit for HVAC System Energy Calculations

CIPM Air Density Equation: Giacomo, P. Metrologia 18: 33-40 (1982), Davis, R.S., Metrologia 29: 67-70 (1992).

Ellipse Equation: Ramanujan, S. "Modular Equations and Approximations to ." Quart. J. Pure. Appl. Math. 45, 350-372, 1913-1914.