2E.M.M.Fonseca,F.J.M.Q.deMelo,Numerical solution of curved pipes submitted to in-plane loading conditions[J].Thin-Walled Structures 48(2010) 103-109.
3E.M.M.Fonseca Determination of flexibility factors in curved pipes with end restraints using a semi-analytic formulation,International Journal of Pressure Vessels and Piping 79(2002)829-840.
4Kevin Weicker,Shell analysis of thin-walled pipes.Part Ⅰ Field equations and solution[J].International Journal of Pressure Vessels and Piping,2010,87 (2010)402-413.