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Projector augmented-wave method

An approach for electronic structure calculations is described that generalizes both the pseudopotential method and the linear augmented-plane-wave (LAPW) method in a natural wa...

1994 Physical review. B, Condensed matter 85109 citations

An Inventory for Measuring Depression

The difficulties inherent in obtaining consistent and adequate diagnoses for the purposes of research and therapy have been pointed out by a number of authors. Pasamanick<sup>12...

1961 Archives of General Psychiatry 37547 citations

The Strength of Weak Ties

Analysis of social networks is suggested as a tool for linking micro and macro levels of sociological theory. The procedure is illustrated by elaboration of the macro implicatio...

1973 American Journal of Sociology 37407 citations