@Article{ frelonpar06, author = { Freddi, Lorenzo and Londero, Alessandro and Paroni, Roberto }, title = { A simple variational derivation of slender rods theory }, journal = { Applied and Industrial Mathematics in Italy II, Series in Mathermatics for Applied Sciences. World Scientific }, year = { 2007 }, volume = { 75 }, pages = { 363-374 }, URL = { http://cvgmt.sns.it/paper/1221/ }, note = { cvgmt preprint} }