Building Blocks of Successful Aging: A Focus Group Study of Older Adults' Perceived Contributors to Successful Aging

The Measurement of Observer Agreement for Categorical Data

J. Richard Landis, Gary G. Koch · Biometrics · 1977 · 78.9K citations · Full text

Public Health, Biostatistics, Categorical Data Analysis +12

The Discovery of Grounded Theory: Strategies for Qualitative Research.

Helmut R. Wagner, Barney G. Glaser, Anselm L. Strauss · Social Forces · 1968 · 46.6K citations

Social Sciences, Sociology, Ethnography +11

The Discovery of Grounded Theory; Strategies for Qualitative Research

Barney G. Glaser, Anselm L. Strauss, Elizabeth Strutzel · Nursing Research · 1968 · 39K citations

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Qualitative evaluation and research methods

Michael Quinn Patton · 1990 · 21.8K citations

Social Sciences, Anthropology, Ethnography +11

Aging, Natural Death, and the Compression of Morbidity

James F. Fries · New England Journal of Medicine · 1980 · 3.3K citations

Education, Geriatric Medicine, Aging +11