Carl F. Long
- Vibration of a Radially Loaded Spherical Shell. Dans: Journal of the Engineering Mechanics Division (ASCE), v. 92, n. 2 (avril 1966). (1966):
- Frequency Analysis of Complete Spherical Shells. Dans: Journal of the Engineering Mechanics Division (ASCE), v. 95, n. 3 (juin 1969). (1969):