Salamaga, Marcin. 2015. “A Proposal to Modify the Revealed Comparative Index With the Application of Rational Functions”. Krakow Review of Economics and Management Zeszyty Naukowe Uniwersytetu Ekonomicznego W Krakowie, no. 923 (December): 23-35. https://doi.org/10.15678/ZNUEK.2013.0923.02.