@incollection{ZerresIsraelTscheulin2017, author = {Christopher Zerres and Kai Israel and Dieter K. Tscheulin}, title = {Online-Marketing-Controlling}, series = {Handbuch Marketing-Controlling}, publisher = {Springer Gabler}, isbn = {9783662504055}, pages = {173 -- 190}, year = {2017}, language = {de} }