Clive Fletcher and Caroline Bailey. «Assessing self-awareness: Some issues and methods.» Journal of Managerial Psychology 18.5 (2003): 395–404; John J. Sosik and Lara E. Megerian. «Understanding leader emotional intelligence and performance: The role of self-other agreement on transformational leadership perceptions.» Group & Organization Management 24.3 (1999): 367–390.