KOWERSKI, M. On the Informative Value of "Remain Unchanged" Answers in the Economic Sentiment Surveys. Regional Barometer. Analyses & Prognoses, [S. l.], n. 4 (14), p. 47–61, 2008. DOI: 10.56583/br.1461. Disponível em: https://czaz.akademiazamojska.edu.pl/index.php/br/article/view/1461. Acesso em: 20 may. 2024.