1. Over de stabiliteit van het elastisch even wicht;Koiter;Thesis,1945
2. The buckling and pest-buckling behavior of spherical caps under concentrated load;Fitch;Internat. J. Solids and Structures,1968
3. Elastic stability of near-perfect shallow spherical shells;Krenzke;AIAA Jnl.,1963
4. The buckling of clamped shallow spherical shells under uniform pressure;Parmerter;California Inst. Techn. Rept. AFOSR, No. 5362,1963
5. Stability of shallow spherical shells under the action of the system of loading consisting of uniform pressure and concentrated load at the apex;Loo,1964