There several platforms where you can access information on Shahbag movement in Bangladesh. I am providing some of them.
Wiki page http://en.wikipedia.org/wiki/2013_Shahbag_protests
There are some blog posts on Shahbag movement:
Blog 1 http://mukto-mona.com/wordpress/
Blog 2 http://mukto-mona.com/bangla_blog/
Media reports:
3. http://www.guardian.co.uk/world/2013/feb/13/shahbag-protest-bangladesh-quader-mollah
4. http://www.indianexpress.com/news/tahrir-to-shahbag/1079050/
5. http://www.dw.de/protesters-want-more-than-death-sentences/a-16623308
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