作者: Neal Robert Haddaway , Alexandra Mary Collins , Deborah Coughlin , Stuart Kirk
DOI: 10.1371/JOURNAL.PONE.0138237
关键词: Systematic review 、 Grey literature 、 String searching algorithm 、 The Internet 、 Bioinformatics 、 Citation analysis 、 MEDLINE 、 Bibliometrics 、 Information retrieval 、 Resource (project management) 、 Medicine
摘要: … provided access to almost three times as many articles free of charge than PubMed (14 and … of Biological Abstracts, MEDLINE, SciELO, Web of Science Core Collections and Zoological …