@article{Esc11b, author = {Eschenb{\"a}cher, J. and Seifert, M. and Thoben, K.-D.}, title = {Improving distributed innovation processes in virtual organisations through the evaluation of collaboration intensities}, journal = {Product Planning \& Control - The Management of Operations}, year = {2011}, volume = {22}, number = {5-6}, doi = {10.1080/09537287.2010.536620}, pages = {473-487} }