1. Economic Structure and Regional Labor Productivity Differentials in Poland
:KUŹMAR, Sławomir. Economic Structure and Regional Labor Productivity Differentials in Poland. In AD ALTA : journal of interdisciplinary research. - Hradec Králové : MAGNANIMITAS, 2014. ISSN 2464-6733, 2014, vol. 4, no. 2, pp. 18-21.