Queries on number of authors in journal paper,

[hari_preetha]

Sir,
If number of authors are more in the journal paper, how we measure their contribution to work. Suppose if journal paper contains 5 authors. Where first author stands, where second, third, fourth ,and fifth authors stands.
How we can gauge contribution of each author to journal paper.Why more number of people will be in some journal papers.
How can we calculate impact factor, if journal contains more than one author.

 

[Dominik Przyborowski]

Five authors, pfff. Check any paper made by ATLAS colaboration

 

[MahmoudHassan]

mmm actually Elsiver did great job in this file regarding impact factor and authors problem
it is a large calculation issue
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also this article i found on google that helps a lot
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