de Groot, I. Manon, and W. Fred van Raaij. “The Role of Mental Budgeting in Healthy Financial Behavior: A Survey Among Self-Employed Entrepreneurs”. Applied Studies in Agribusiness and Commerce, vol. 10, no. 2-3, Aug. 2016, pp. 15-25, https://doi.org/10.19041/APSTRACT/2016/2-3/2.