Wollenburg, J., Hübner, A., Kuhn, H., & Trautrims, A. (2018). From bricks-and-mortar to bricks-and-clicks: logistics networks in omni-channel grocery retailing. International Journal of Physical Distribution and Logistics Management, 48(4), https://doi.org/10.1108/IJPDLM-10-2016-0290