Sember Marijan, Utrobicić Ana, Petrak Jelka
Central Medical Library, University of Zagreb School of Medicine, Salata 3, 10000 Zagreb, Croatia.
Croat Med J. 2010 Apr;51(2):99-103. doi: 10.3325/cmj.2010.51.99.
To analyze the 2007 citation count of articles published by the Croatian Medical Journal in 2005-2006 based on data from the Web of Science, Scopus, and Google Scholar.
Web of Science and Scopus were searched for the articles published in 2005-2006. As all articles returned by Scopus were included in Web of Science, the latter list was the sample for further analysis. Total citation counts for each article on the list were retrieved from Web of Science, Scopus, and Google Scholar. The overlap and unique citations were compared and analyzed. Proportions were compared using chi(2)-test.
Google Scholar returned the greatest proportion of articles with citations (45%), followed by Scopus (42%), and Web of Science (38%). Almost a half (49%) of articles had no citations and 11% had an equal number of identical citations in all 3 databases. The greatest overlap was found between Web of Science and Scopus (54%), followed by Scopus and Google Scholar (51%), and Web of Science and Google Scholar (44%). The greatest number of unique citations was found by Google Scholar (n=86). The majority of these citations (64%) came from journals, followed by books and PhD theses. Approximately 55% of all citing documents were full-text resources in open access. The language of citing documents was mostly English, but as many as 25 citing documents (29%) were in Chinese.
Google Scholar shares a total of 42% citations returned by two others, more influential, bibliographic resources. The list of unique citations in Google Scholar is predominantly journal based, but these journals are mainly of local character. Citations received by internationally recognized medical journals are crucial for increasing the visibility of small medical journals but Google Scholar may serve as an alternative bibliometric tool for an orientational citation insight.
基于科学网、Scopus和谷歌学术的数据，分析《克罗地亚医学杂志》2005 - 2006年发表文章在2007年的被引频次。
在科学网和Scopus中检索2005 - 2006年发表的文章。由于Scopus返回的所有文章都包含在科学网中，所以后者的列表作为进一步分析的样本。从科学网、Scopus和谷歌学术中获取列表上每篇文章的总被引频次。对重叠和独特的被引文献进行比较和分析。使用卡方检验比较比例。
谷歌学术返回的有被引文章比例最高（45%），其次是Scopus（42%）和科学网（38%）。几乎一半（49%）的文章没有被引，11%的文章在所有三个数据库中的相同被引频次相同。科学网和Scopus之间的重叠度最高（54%），其次是Scopus和谷歌学术（51%），以及科学网和谷歌学术（44%）。谷歌学术发现的独特被引文献数量最多（n = 86）。这些被引文献中的大多数（64%）来自期刊，其次是书籍和博士论文。所有引用文献中约55%是开放获取的全文资源。引用文献的语言大多是英语，但多达25篇引用文献（29%）是中文。
谷歌学术分享了另外两个更具影响力的文献数据库返回的42%的被引文献。谷歌学术中独特被引文献列表主要基于期刊，但这些期刊主要是地方性的。国际知名医学期刊获得的被引文献对于提高小型医学期刊的知名度至关重要，但谷歌学术可作为一种替代的文献计量工具，用于进行定向的被引文献洞察。
