1. S. Kendrick, The buckling under external pressure of circular cylindrical shells with evenly spaced, equal strength circular ring frames: Part I NCRE Report R/211; Part II NCRE Report R/243; Part III NCRE Report R/244.
2. The buckling under external pressure of ring stiffened circular cylinders;Kendrick;J. RINA,1965
3. The instability of ring stiffened circular cylindrical shells under uniform external pressure;Ross;J. RINA,1965
4. Discrete element approach to structural instability analysis;Gallagher;J. AIAA,1963
5. A discrete element procedure for thin shell instability analysis;Gallagher;J. AIAA,1967