Strong unique continuation property for an elasticity system with residual stress Ching-Lung Lin 35J15strong unique continuation Indiana University Mathematics Journal 2004 text pdf 10.1512/iumj.2004.53.2355 10.1512/iumj.2004.53.2355 en Indiana Univ. Math. J. 53 (2004) 557 - 582 state-of-the-art mathematics http://iumj.org/access/