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Energetyka > 2015 > nr 1 > 17--21
Polish Journal of Management Studies > 2015 > Vol. 12, No. 1 > 154--165
Studia Ekonomiczne > 2015 > 221 > 7-21
Bulletin of Geography. Socio-economic Series > 2014 > 24 > 24 > 27-40
European Journal of Operational Research > 2014 > 234 > 2 > 561-570
Energy Economics > 2014 > 42 > Complete > 299-312
Procedia Economics and Finance > 2014 > 10 > Complete > 275-285
Procedia Economics and Finance > 2014 > 15 > Complete > 609-616
Journal of Economic Dynamics and Control > 2014 > 38 > Complete > 105-124
Acta Mathematicae Applicatae Sinica, English Series > 2014 > 30 > 2 > 279-288
Science China Information Sciences > 2014 > 57 > 9 > 1-14
Energetyka > 2014 > nr 4 > 206--210
Energetyka > 2014 > nr 4 > 201--205
Resources Policy > 2013 > 38 > 4 > 470-480
Accounting & Finance > 53 > 3 > 623 - 641
Automatica > 2013 > 49 > 8 > 2317-2329
Economic Modelling > 2013 > 33 > C > 493-499