↑ Sadock, J. M. (1977). Truth and approximation. Berkeley Linguistics Society Papers 3: 430–439.
1 2 Ferson, S., J. O'Rawe, A. Antonenko, J. Siegrist, J. Mickley, C. Luhmann, K. Sentz, A. Finkel (2015). Natural language of uncertainty: numeric hedge words. International Journal of Approximate Reasoning 57: 19–39.
↑ de Lusignan, S., J. Belsey, N. Hague and B. Dzregah (2004). End-digit preference in blood pressure recordings of patients with ischaemic heart disease in primary care. Journal of Human Hypertension 18: 261–265.
