Refine your results
- business6,517,922
- business.industry4,580,467
- computer science2,910,338
- news, opinion and commentary1,816,039
- 02 engineering and technology1,489,995
- engineering1,344,482
- mathematics1,199,525
- business, international1,070,688
- media_common1,064,394
- english45,482,258
- undetermined10,527,517
- german780,947
- spanish; castilian263,181
- french244,509
- portuguese233,016
- russian194,078
- chinese184,641
- spanish162,761
- Academic Journals30,750,590
- News4,858,414
- Magazines4,422,840
- Electronic Resources3,851,755
- Reports3,054,883
- eBooks2,929,492
- Conference Materials2,213,173
- Books785,386
- Reviews646,533
- scientific reports266,995
- plos one227,060
- aip conference proceedings188,988
- applied mechanics and materials96,080
- advanced materials research94,850
- nature communications90,212
- journal of chemical physics89,046
- ieee access83,276
- sensors (14248220)76,962
- united states553,576
- china219,431
- united kingdom173,057
- australia111,830
- india93,071
- europe77,688
- canada75,835
- england55,719
- japan51,875
- Complementary Index21,041,174
- OpenAIRE13,420,073
- Springer Nature Journals7,070,127
- Gale General OneFile7,043,527
- OAIster3,809,540
- Academic Search Index3,072,424
- arXiv2,458,791
- Supplemental Index2,052,987
- eBook Index1,927,597
- ieee3,883,244
- springer nature3,686,943
- wiley-blackwell2,637,057
- springer-verlag1,559,930
- elsevier bv1,301,917
- springer berlin heidelberg1,203,947
- elsevier b.v.1,115,682
- mdpi938,330
- springer us918,114