1. ASME, Boiler and Pressure Vessel Code, New York: ASME, 2004, Sects. 2 and 8.
2. BSI. PD 5500:2006 Specification for Unfired Fusion Welded Pressure Vessels, London: British Standards Inst., 2006.
3. EN 13445, Unfired Pressure Vessels, Part 3: Design, European Committee for Standardisation (CEN), 2002.
4. GOST (State Standard) No. R 52857.3-2007, Vessels and apparatus. Norms and methods of strength calculation. Strengthening the holes in the shells and bottoms with internal and external pressures.
5. Skopinskii, V.N., Napryazheniya v peresekayushchikhsya obolochkakh (Stresses in Intersecting Shells), Moscow: Fizmatlit, 2008.