Media type: E-Article Title: Application of Grey Systems Theory in the Analysis of Data Obtained from Family Businesses Contributor: Wiecek-Janka, Ewa; Mierzwiak, Rafal; Nowak, Marcin; Kujawinska, Agnieszka; Majchrzak, Joanna Published: ISMA SYC INT, 2021 Published in: EUROPEAN RESEARCH STUDIES JOURNAL, XXIV (2021) Special Issue 1, Seite 494-510 Language: Not determined DOI: 10.35808/ersj/2057 ISSN: 1108-2976 Keywords: General Economics, Econometrics and Finance ; General Business, Management and Accounting Origination: Footnote: