The best thing u can possibly do is to get an ieee login.. go there and search for the recent publications.. it wud obviosuly help..ieee papers are always good as they have a standard and accredation!
The best place for DSP related papers is IEEE. But you have to be a member of this community to actually download their papers. Membership i believe is $121 per year after you fill in their application form.
Or what you could do is post the paper title that you require on this board and some one will upload it for your benefit.