
中国科技论文在线
中国科技论文在线是经教育部批准、由教育部科技发展中心主办的科技论文网站,利用现代化信息技术和互联网出版的优势,为科研论文及时发布、创新思想快速交流、学术成果高效转化提供了快速通道。
Open Access Library (www.oalib.com) is an academic search engine and publisher. You can download research papers for free and submit your paper to it. It is a shared acad...