Anastasia Kassiani Blitsi Georgios Stavropoulos Konstantinos Votis Vision Paper: Uncovering Illegal Firearm Transactions in Cryptocurrency Networks. 4031-4035 2023 IEEE Big Data https://doi.org/10.1109/BigData59044.2023.10386732 conf/bigdataconf/2023 db/conf/bigdataconf/bigdataconf2023.html#BlitsiSV23