Arya Raditya Prawira Putra, Dendi, 		Purwanto, Yudha, AND 		Paryasto, Marisa.
"The IMPLEMENTATION OF BLOCKCHAIN AS COVID-19 TEST AND VACCINE CERTIFICATE STORAGE SYSTEM" <em>[CEPAT] Journal of Computer Engineering: Progress, Application and Technology</em> [Online], Volume 1 Number 02 (30 August 2022)