Privately copyrighted material should not be reproduced without permission or license from the copyright owner, unless permitted under the fair use doctrine codified in 17 USC §107. Single copy reproduction of portions of such material for use by the copier for official research or related purposes is ordinarily permissible. Any questions concerning the reproduction of copyrighted material should be referred to counsel .
By accessing this database you agree to abide by the copyright and/or site license conditions set forth by the database producer .
Click the link below to enter Science Direct - Elsevier: