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We have developed a formula that assigns relative values to each author of the list in any publication according to the authors' relative positions. The formula satisfies several criteria of theoretical and practical significance. We tested the formula's validity and usefulness with bibliographical references from the INSPEC database, mainly from the physical sciences. Enforced alphabetical sorting, different names of single authors and other statistical disturbances are accounted for. Our results demonstrate that our formula, or any other that satisfies several objective and quantitative criteria, can and often should be used as an additional criterion in the processes of evaluating relative scientific productivity, detecting experts in a given discipline, etc.

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. Covachev , V. Stamova , I. 1994 Stability under persistent disturbances of impulsive differential-difference equations of neutral type J. Math. Anal. Appl

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a cognitive distortion; that is, an error in judgment. As he understood it, such excessive misapprehension was due to an excess of subjectification. He thus came to hypothesize that “affective disturbances in depression” were “secondary to or

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the K explanatory variables) which are assumed independent of disturbances ∊ it , a sequence of independent and identically distributed random variables with zero mean and constant variance; and finally, μ i includes the effect of those variables of

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change similar to the dashed trend line in the diagrams for annual and biennial evaluation, and without the disturbance by evident random oscillations seen for the shorter periods. Summing up, we have where: : Observed performance variation

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Journal of the American Chemistry Society ( JACS ), the two interdisciplinary disturbances and developments could be compared to developments in a relatively stable field of studies. The two subdisciplines of organic and inorganic chemistry are interfaced

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covariates, β is k × 1 vector of fixed coefficients, e i is ( p × 1) × 1 vector of disturbances, and ∑ is a ( p − 1) × ( p − 1) positive definite matrix. For the model to be identified, the first diagonal element of ∑ is constrained, σ 11

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