Refine your results
- business6,517,944
- business.industry4,580,467
- computer science2,910,170
- news, opinion and commentary1,816,039
- 02 engineering and technology1,489,995
- engineering1,344,431
- mathematics1,199,441
- business, international1,070,688
- media_common1,064,394
- english45,227,534
- undetermined10,527,461
- german780,724
- spanish; castilian263,058
- french244,359
- portuguese232,980
- russian194,059
- chinese184,406
- spanish162,711
- Academic Journals30,737,960
- News4,858,343
- Magazines4,421,555
- Electronic Resources3,851,754
- Reports3,057,227
- eBooks2,928,481
- Conference Materials2,386,740
- Books845,038
- Reviews646,480
- scientific reports266,713
- plos one226,834
- sae technical paper series215,886
- aip conference proceedings188,760
- ssrn electronic journal129,856
- applied mechanics and materials96,080
- advanced materials research94,850
- nature communications90,130
- journal of chemical physics89,018
- united states553,501
- china219,214
- united kingdom172,975
- australia111,698
- india92,990
- europe77,652
- canada75,788
- england55,691
- japan51,841
- Complementary Index21,032,131
- OpenAIRE13,420,074
- Springer Nature Journals7,067,937
- Gale General OneFile7,043,527
- OAIster3,809,540
- Academic Search Index3,071,346
- arXiv2,458,791
- Supplemental Index2,052,570
- eBook Index1,926,923
- ieee3,913,655
- springer nature3,687,062
- wiley-blackwell2,636,633
- springer-verlag1,559,932
- elsevier bv1,351,832
- springer berlin heidelberg1,205,664
- elsevier b.v.1,038,568
- mdpi938,329
- springer us918,225