Approval-Based Committee Voting in Practice: A Case Study of (over-)Representation in the Polkadot Blockchain - Boehmer, Niclas; Brill, Markus; Cevallos, Alfonso; Gehrlein, Jonas; Sanchez Fernandez, Luis; Schmidt Kraepelin, Ulrike (The Thirty-Eighth AAAI Conference on Artificial Intelligence (AAAI-24), 2024)