@phdthesis{Wollenburg2017, author = {Johannes Wollenburg}, title = {Empirical studies in multi-channel and omni-channel retail operations and logistics [cumulative dissertation]}, type = {doctoralthesis}, pages = {132 Bl{\"a}tter : Illustrationen, Diagramme}, school = {Katholische Universit{\"a}t Eichst{\"a}tt-Ingolstadt}, year = {2017}, }