TY - JOUR AU - Procházka, Petr AU - Šejnoha, Jiří TI - Extended Hashin-Shtrikman variational principles JO - Applications of Mathematics PY - 2004 SP - 357 EP - 372 VL - 49 IS - 4 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.1007/s10492-004-6404-z/ DO - 10.1007/s10492-004-6404-z LA - en ID - 10_1007_s10492_004_6404_z ER -