S. Klingner, M. Böttcher, M. Becker, and A. Döhler. RESER 2011 Productivity of Services NextGen - Beyond Output/Input. Conference Proceedings., (8th-9th 09 2011)
S. Klingner, M. Böttcher, M. Becker, and A. Döhler. RESER 2011 Productivity of Services NextGen - Beyond Output/Input. Programme and Abstracts., page 150. (8th-9th 09 2011)
S. Klingner, M. Böttcher, M. Becker, and A. Döhler. RESER 2011 Productivity of Services NextGen - Beyond Output/Input. Conference Proceedings., (8th-9th 09 2011)
S. Klingner, M. Böttcher, M. Becker, and A. Döhler. RESER 2011 Productivity of Services NextGen - Beyond Output/Input. Programme and Abstracts., page 150. (8th-9th 09 2011)