1. ANSI Standard B89.3.4-198X, 1985, Axes of Rotation
2. Unification of Terminology Concerning the Error Motion of Axes of Rotation;Bryan;Annals of the CIRP,1975
3. A Simple Method for Separating Spindle Error from Test Ball Roundness Error;Donaldson;Annals of the CIRP,1972
4. ISO Draft International Standard ISO/DIS 6318, 1983, Measurement of Roundness - Terms, Definitions and Parameters of Roundness
5. ISO Draft International Standard ISO/DIS 4291, 1983, Methods for the Assessment of Departure from Roundness - Measurement of Variations in Radius