Lisa M. Gruntkowski Luis F. Martinez Online Grocery Shopping in Germany: Assessing the Impact of COVID-19. 984-1002 2022 September 17 J. Theor. Appl. Electron. Commer. Res. 3 https://doi.org/10.3390/jtaer17030050 db/journals/jtaer/jtaer17.html#GruntkowskiM22