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https://scholar.google.com/scholar?as_q=Permacoin%3A+Re-purposing+Bitcoin+Work+for+Data+Preservation&as_occt=title&hl=en&as_sdt=0%2C31
您即将离开知乎,请注意您的帐号和财产安全。
https://scholar.google.com/scholar?as_q=Permacoin%3A+Re-purposing+Bitcoin+Work+for+Data+Preservation&as_occt=title&hl=en&as_sdt=0%2C31