Robert B. Knowles
- Strength of Concrete Filled Steel Tubular Columns. Dans: Journal of the Structural Division (ASCE), v. 95, n. 12 (décembre 1969). (1969):
- Axial Load Design for Concrete Filled Steel Tubes. Dans: Journal of the Structural Division (ASCE), v. 96, n. 10 (octobre 1970). (1970):