1. Rechnerische Untersuchung der Beanspruchungsverhältnisse in gewölbten Böden mit Stutzen im Krempenbereich;Ringelstein,1982
2. Specification for unfired fusion welded pressure vessels,1994
3. Computation of the stresses from local loads in spherical pressure vessels or pressure vessel heads;Bijlaard;WRCB no. 34,1957
4. Stresses in a spherical vessel from radial loads acting on a pipe;Bijlaard;WRCB no. 49,1959
5. Stresses in a spherical vessel from external moments acting on a pipe;Bijlaard;WRCB no. 34,1957