id	domain	url
fcis-5316	en.cnki.com.cn	http://en.cnki.com.cn/article_en/cjfdtotalzjdl201907001.htm
fcis-5316	dl.acm.org	http://dl.acm.org/doi/pdf/10.1145/3429889.3429932
fcis-5316	link.springer.com	https://link.springer.com/chapter/10.1007/978-3-662-468036_10
fcis-5316	www.researchgate.net	www.researchgate.net/publication/265116876_ppcoin_peerto-peer_crypto-currency_with_proof-of-stake