@article {5521, title = {Co-Productivity as a New Value Theory in Value Chain Analysis}, journal = {Central European Management Journal}, volume = {28}, year = {2020}, month = {2020}, pages = {52-65}, issn = {2658-0845 }, doi = {10.7206/cemj.2658-0845.15}, author = {Adam Noga and Jarz{\k e}bowski, Sebastian and Maci{\k a}g, Piotr} }