5Pablo D. Bstista, Monica G. Campiteli, Osarne Kinouchi, et al. Is it Possible to Compare Researchers with Different Scientific Interests[J]. Scientometrics,2006(1) : 179 - 189.
6J E Hirsch. An Index to Quantify an Individual's Scientific Rearch Outpul [J]. Proceedinps of the National Academy of the USA, 2005,102 : 16569 - 16572.