select paper.paper_id,paper_name, paper_http from paper ,category_master,periodicity_master,category where category_master.category_id=category.category_id and category.paper_id=paper.paper_id
					and category_master.category='Scientific' and periodicity_master.periodicity_id=paper.periodicity_id and periodicity_master.periodicity='biweekly' group by paper_name order by paper_name