TY - JOUR AU - Zaslavski, Alexander J. TI - On a variational problem arising in crystallography JO - ESAIM: Control, Optimisation and Calculus of Variations PY - 2007 SP - 72 EP - 92 VL - 13 IS - 1 PB - EDP-Sciences UR - http://www.numdam.org/articles/10.1051/cocv:2007003/ DO - 10.1051/cocv:2007003 LA - en ID - COCV_2007__13_1_72_0 ER -