1. Retail E-Commerce Sales Worldwide from 2014 to 2024. Statista
https://www.statista.com/statistics/379046/worldwide-retail-e-commerce-sales/
2. Online FMCG Sales Growing Four Times Faster than Offline
https://www.fmcgceo.co.uk/online-fmcg-sales-growing-four-times-faster-than-offline/
3. The Digital Transformation of the Grocery Business-Driven by Consumers Powered by Technology and Accelerated by the COVID-19 Pandemic;Abbu;Proceedings of the World Conference on Information Systems and Technologies,2021
4. Nielsen: Convenience, Continuous Innovation Key to Retail Success
https://csnews.com/nielsen-convenience-continuous-innovation-key-retail-success
5. Internet Shopping