1. Anon., ASME 3 Code, 1977 edition.
2. Uber die Formaderung dumvandiger Rohre insbesonders federnder Ansgleichrorhe;von Karman;Zeitschrift VDI,1911
3. In-plane bending of a short radius curved pipe bend;Jones;Trans. ASME, J. Eng. Ind.,1967
4. Shell theory analysis of pure in-plane bending of a pipe bend;Thompson,1975
5. Properties of thin walled curved tubes of short radius bend;Purdue;Trans. ASME,1951