Vũ Ngọc, Q., Mai Xuân, K. and Trần Mạnh, C. 1665766800. Design and fabricate contactless buttons to limit the spread of the Covid-19 pandemic. Transport and Communications Science Journal. 73, 8 (1665766800), 814-822. DOI:https://doi.org/10.47869/tcsj.73.8.6.