Position	Website	Change	Thumbnail
1	archive.org - Internet Archive: Digital Library of Free Books, Movies, Music & Wayback Machine Internet Archive is a non-profit digital library offering free universal access to books, movies & music, as well as 150 billion archived web page...	27
2	link.aps.org - APS Journals	10
3	citeseerx.ist.psu.edu - CiteSeerX Scientific Literature Digital Library incorporating autonomous citation indexing, awareness and tracking, citation context, related document retrieval...	0
4	novapublishers.com - Nova Science Publishers - The Latest Ebooks, Hardcovers and Softcovers	9
5	osapublishing.org - OSA | OSA Publishing	0
6	link.springer.com - Home - Springer Providing researchers with access to millions of scientific documents from journals, books, series, protocols and reference works.	-4
7	iopscience.iop.org - IOPscience::.. Welcome! IOPscience is a unique platform for IOP-hosted journal content providing site-wide electronic access to more than 130 years of leading scientific rese...	-6
8	arqiv.org - arQiv: Q&A of arXiv articles, and discussions	0
9	file.scirp.org - 测试页面	0
10	65.54.113.26 - Microsoft Academic Search Find information about academic papers, authors, conferences, journals, and organizations from multiple sources.	0
11	arxiv.org - arXiv.org e-Print archive	-5
12	scholar.google.com - Google Scholar	0

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