1. ASME, Boiler and Pressure Vessel Code, Secs. II and VIII, New York (2004).
2. PD 5500:2006, Specification for Unfired Fusion Welded Pressure Vessels, British Standard Institution, London.
3. EN 13445, Unfired Pressure Vessels, Pt. 3: Design, European Committee for Standardization (CEN), 2002.
4. GOST R 52857.3−2007, Vessels and Apparatuses. Standards and Methods of Strength Calculations. Strengthening of Holes in Shells and End Plates (Bottoms) under Internal and External Pressures.
5. V. N. Skopinskii, Stresses in Intersecting Shells [in Russian], FIZMATLIT, Moscow (2008), p. 400.