@Misc{ GiaMarMod12, author = { Giaquinta, Mariano and Mariano, Paolo Maria and Modica, Giuseppe }, title = { Stress constraints in simple bodies undergoing large strains: a variational approach }, journal = { Proc. Royal Soc. Edinburgh }, year = { 2014 }, pages = { }, URL = { http://cvgmt.sns.it/paper/2045/ }, note = { cvgmt preprint} }