Kowerski, M., J. Bielak, and D. Długosz. “The Assessment by Small and Medium Entrepreneurs of the Usefulness of Tools Used for the Diagnosis and Prognosis of the Economic Situation”. Regional Barometer. Analyses & Prognoses, no. 1 (15), Apr. 2009, pp. 85-102, doi:10.56583/br.1425.