jm VvÁ;Ì¥¢Ôêcpû`#$Yºô48fÇéË%³ùyL5. David Chaum and Torben Pedersen, Transferred Cash Grows in Size, Advances in Cryptology - EUROCRYPT '92, Springer-Verlag, pp. 390-407.
https://whatsonchain.com/tx/dfa52a5e2f25363e95561b47eba0a3abe5ad43b28112e4631f9c5c484962cbc0