Van Dyne, L.V., Ang, S. and Botero, I.C. (2003) Conceptualizing Employee Silence and Employee Voice as Multidimensional Constructs. Journal of Management Studies, 40, 1359-1392.
 Liang, J., Farh, C.I.C. and Farh, J.L. (2012) Psychological Antecedents of Promotive and Prohibitive Voice: A Two-Wave Examination. Academy Management, 55, 71-92.
 Wang, Y. and Hsieh, H. (2013) Organizational Ethical Climate, Perceived Organizational Support, and Employee Silence: A Cross-Level Investigation. Human Relations, 66, 783-802.
 Freeman, R. and Lazear, E. (1995) An Economic Analysis of Works Councils. In: Rogers, J. and Streeck, W., Eds., Works Councils: Consultation, Representation, and Cooperation in Industrial Relations, University of Chicago Press, Chicago, 27-50.