For research, journal, thesis, assignment, documentary etc you can use these links:
http://extranet.who.int/hinari/en/journals.php
http://agora-journals.fao.org/content/en/journals.php
http://oare.research4life.org/content/en/journals.php
http://ardi.wipo.int/content/en/journals.php
http://goali.ilo.org/content/en/journals.php