This article presents a rejoinder on the commentaries regarding the author's focus article titled, "Measurement of Central Aspects of Scientific Research: Performance, Interdisciplinarity, Structure," structuring comments around a number of main topics discussed by the authors of the commentaries. The author presents technical issues that illustrate the limitations of bibliometric analysis and discusses the skewness of citation distributions as a major element in bibliometric analysis, contending that extensive study of the statistical properties of bibliometric measures is of fundamental importance. Because of the skewness of the underlying distribution functions (Redner, 1998; Seglen, 1992, 1994), confidence intervals of bibliometric indicators are a special problem. In his focus article, the author did not discuss such intervals but indicated in bibliometric studies the statistical significance of indicators. The author also discusses the correlation between the outcomes of peer judgment and bibliometric results in research performance assessments. (Contains 1 footnote.)