Heponiemi, T., Elovainio, M., Laine, J., Pekkarinen, L., Eccles, M., Noro, A., Finne-Soveri, H., Sinervo, T. 2007. Productivity and employees' organizational justice perceptions in long-term care for the elderly. Res Nurs Health. 30 (5) 498-507.