@book{28931,
	author = {Muhammad Rafay, Muhammad Aamir, Hassan Ahmed Siddiqui, Muhammad Sabih Mohsin & Muhammad Ismail},
	title = {Blockchain Based E-Certification},
	publisher = {UIT,},
	year = {2017},
	address = {Karachi:},
	url = {https://drive.google.com/file/d/1F9JUvOnOFgMz7kXG6MWcCD89wpKA13zr/view?usp=sharing}
}