The 11th professor Aleksander Zelias international conference on modelling and forecasting of socio-economic phenomena. International conference. The 11th professor Aleksander Zelias international conference on modelling and forecasting of socio-economic phenomena : conference proceedings : may 9-12, 2017, Zakopane, Poland. Referees: Jan Acedański ... [et al.]. 1st ed. Cracow : Foundation of the Cracow University of Economics, 2017. online [466 s.]. ISBN 978-83-65173-85-0.