1. SwissEnergy. Smart city guideline report. Smart City Wheel, based on SwissEnergy / SFOE programme (2019)
2. Zumstein, D., Oswald, C., Brauer, C.: Online retailer survey 2021: empirical findings on the e-commerce boom in switzerland and austria. Tech. rep., ZHAW Zürcher Hochschule für Angewandte Wissenschaften, Winterthur (2021). https://doi.org/10.21256/zhaw-2414, https://digitalcollection.zhaw.ch/handle/11475/23116
3. Schögel, M., Lienhard, S.D.: Marketing Review St. Gallen (2020)
4. Kaewprathum, T.P.: Architectural analysis of retail omni-channel and integration of cash it point-of-sale software with e-commerce platform. Master’s thesis, Karlstad University, Faculty of Health, Science and Technology (2018). http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-68934
5. Zimmer, M., McElrone, M., Anderson Steeves, E.T.: J. Acad. Nutri. Dietetics 121(12), 2464 (2021). https://doi.org/10.1016/j.jand.2021.05.015, https://www.sciencedirect.com/science/article/pii/S2212267221003397