1. Roark, R. J. & Young, W. C., Formulas for Stress and Strain, McGraw-Hill Book Company, New York.
2. DIN 28086-Tragösen (eyelets), DIN Deutsches Institut für Normung e.v.
3. External loads on nozzles;Dekker;Int. J. Pres. Ves. & Piping,1993
4. Bednar, H. H., Pressure Vessel Design Handbook, Van Nostrand Reinhold Company, New York.
5. Secondary stress indices for integral structural attachments to Straight Part (1st part of WRC-198);Dodge;WRC Bulletin,1974