TY - BOOK AU - Hashin,Z. AU - Shtrikman,S. TI - A variational approach to the theory of the elastic behaviour of multiphase materials UR - https://drive.google.com/file/d/1k9sEf9UQG4MqFLfYWgi-WT5lrhpmL2zy/view?usp=drivesdk ER -