Cho Y J
Am J Vet Res. 1977 Jan;38(1):131-3.
The usage of periodical literature in veterinary science was measured by means of citation analysis. Eighty-two percent of the citations in the source of this study, Advances in Veterinary Science and Comparative Medicine (1970-1974), were from periodicals, and 70 of the 743 periodical titles cited (9.4%) contributed 66% of the total periodical citations. Periodical literature cited in the source of the study appeared to have a half-life of 6.1 years, and to double its size approximately every 20 years. The aging patterns of the periodical literature seemed to vary with the publishing age of the periodical, i.e., the literature in the periodicals which have been in publication for more than 40 years showed a more gradual aging pattern than did that in the newer periodicals.
通过引文分析来衡量兽医科学领域期刊文献的使用情况。本研究的资料来源《兽医科学与比较医学进展》（1970 - 1974年）中，82%的引文来自期刊，在被引用的743种期刊标题中，有70种（9.4%）贡献了全部期刊引文的66%。该研究资料来源中引用的期刊文献似乎半衰期为6.1年，且大约每20年数量就会翻倍。期刊文献的老化模式似乎因期刊的出版年限而异，也就是说，已出版40多年的期刊中的文献老化模式比新期刊中的文献更为平缓。
