@techreport{TR-IC-09-20, number = {IC-09-20}, author = {Cleo Billa and Jacques Wainer and Siome Goldenstein}, title = {Invisible Work in Standard Bibliometric Evaluation of Computer Science}, month = {June}, year = {2009}, institution = {Institute of Computing, University of Campinas}, note = {In English, 8 pages. \par\selectlanguage{english}\textbf{Abstract} Science is a competitive business, and researchers from different fields are constantly compared in terms of funding and for promotion evaluations. This article analyzes the quantity of computer scientists' work which is not duly recognized when using Web of Science and/or Scopus bibliometrics. We randomly selected CS faculty from highly-ranked US Computer Science departments and determined that, on average, 67\% of their published work is not accounted for within Web of Science searches and 44\% is absent when searching with Scopus. We defined this parameter as the invisible work rate. We compared these figures to similar samples from Mathematics, Physics, and Electrical Engineering faculty. While CS and EE have significantly distinct publishing patterns as compared to Mathematics and Physics, the variance of the invisible work rate for CS is high, which suggests that different subareas of CS also have different publication practices -- a possible indication that it will be difficult for computer scientists to agree on one bibliometric evaluation criterion. } }