1. Timoshenko, S., and Goodier, J. N., Theory of Elasticity, pp.69-73and 352-354;McGraw-Hill Book Company, Inc., New York, 1951.
2. Nadai, A., Theory of Flow and Fracture of Solids, pp.482-489; McGraw-Hill Book Company, Inc., New York, 1950.
3. Partially Plastic Rotating Discs