@book{KilleKlausNehmetal., author = {Kille, Christian and Klaus, P. and Nehm, A. and Bone, T. and Wilhelm, M.}, title = {Der 'BvDP Liberalisierungsindex'}, publisher = {BvDP}, address = {Bonn}, language = {de} } @book{KilleKlausSiebeletal., author = {Kille, Christian and Klaus, P. and Siebel, L. and Bone, T.}, title = {Der ‚BvDP Liberalisierungsindex'}, editor = {BvDP,}, address = {Bonn}, language = {de} }