J. FitzGerald

Nurse staffing levels and hospital mortality in critical care settings: literature review and meta-analysis.

Ellen Balka, M. Schulzer, R. van der Wal, 2006, Journal of advanced nursing.

Determinants of hospital length of stay among patients with pneumonia admitted to a large Canadian hospital from 1991 to 2001.

A. Levy, R. Reid, M. Schulzer, 2005, Canadian Respiratory Journal.