Macfarlane, B. The Ethics of Multiple Authorship: power, performativity and the gift economy, Studies in Higher Education, http://www.tandfonline.com/doi/full/10.1080/03075079.2015.1085009 (OPEN ACCESS)
As far as the academic evaluation in the Indian universities is concerned first and the corresponding author share equal marks (60% each) and rest of author share 40%.