(en) Akshoy Paul et Pijush Roy, Sanchayan Mukherjee, Mechanical Sciences : Engineering Mechanics and Strength of Materials, New Delhi, Prentice Hall of India, , 596 p. (ISBN978-81-203-2611-8, OCLC166755089, lire en ligne), p. 215
worldcat.org
(en) Akshoy Paul et Pijush Roy, Sanchayan Mukherjee, Mechanical Sciences : Engineering Mechanics and Strength of Materials, New Delhi, Prentice Hall of India, , 596 p. (ISBN978-81-203-2611-8, OCLC166755089, lire en ligne), p. 215