@incollection{PaWaC09, address = {Bad Honnef}, author = {Parwoll, Moritz and Wagner, Ralf}, booktitle = {{A}ging {S}ociety and its {I}mplications on {S}ervice {M}arketing {A}pproaches in the {H}ospitality, {T}ourism and {T}ransport}, editor = {Bornemeyer, Claudia and Schneider, J\"urgen}, interhash = {0fdc27a037cceb3f86b08c232fd03221}, intrahash = {5a894accfb147a62f0e2d8cd2032a2bb}, pages = {19-40}, publisher = {Bock}, title = {{D}irect {M}arketing for {B}est-{A}gers: {I}n {D}ialogue with {C}hallenging {C}ustomers}, year = 2011 }