Whelan, C. (1991). The Impact of Sense of Control and Social Support on Psychological Distress: A Test of the Hypothesis of Functional Substitution, ESRI Working Paper 26, Dublin: ESRI, https://www.esri.ie/publications/the-impact-of-sense-of-control-and-social-support-on-psychological-distress-a-test-of-the-hypothesis-of-functional-substitution