By Bednarz Ludwik M.   in International Journal of Global Energy Issues

ISSN:0954-7118|34|1-2|16-24

Inderscience Publishers‎(2010)‎

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By Michna Jerzy   Bednarz Ludwik M.   in International Journal of Entrepreneurship and Innovation Management

ISSN:1368-275X|6|1-2|4-17

Inderscience Publishers‎(2005)‎

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