Esders 2021, p. 1. Esders, Stefan (2021). "Chapter 1 Wergild and the Monetary Logic of Early Medieval Conflict Resolution". In Bothe, Lukas; Esders, Stefan; Nijdam, Han (eds.). Wergeld, Compensation and Penance: The Monetary Logic of Early Medieval Conflict Resolution. pp. 1–37. doi:10.1163/9789004466128_002.
Haubrichs 2021, p. 94. Haubrichs, Wolfgang (2021). "Chapter 4 Wergeld: The Germanic Terminology of Compositio and Its Implementation in the Early Middle Ages". In Bothe, Lukas; Esders, Stefan; Nijdam, Han (eds.). Wergeld, Compensation and Penance: The Monetary Logic of Early Medieval Conflict Resolution. pp. 92–112. doi:10.1163/9789004466128_005.
Haubrichs 2021, p. 107. Haubrichs, Wolfgang (2021). "Chapter 4 Wergeld: The Germanic Terminology of Compositio and Its Implementation in the Early Middle Ages". In Bothe, Lukas; Esders, Stefan; Nijdam, Han (eds.). Wergeld, Compensation and Penance: The Monetary Logic of Early Medieval Conflict Resolution. pp. 92–112. doi:10.1163/9789004466128_005.
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Haubrichs 2021, pp. 107–108. Haubrichs, Wolfgang (2021). "Chapter 4 Wergeld: The Germanic Terminology of Compositio and Its Implementation in the Early Middle Ages". In Bothe, Lukas; Esders, Stefan; Nijdam, Han (eds.). Wergeld, Compensation and Penance: The Monetary Logic of Early Medieval Conflict Resolution. pp. 92–112. doi:10.1163/9789004466128_005.
Esders 2021, p. 3. Esders, Stefan (2021). "Chapter 1 Wergild and the Monetary Logic of Early Medieval Conflict Resolution". In Bothe, Lukas; Esders, Stefan; Nijdam, Han (eds.). Wergeld, Compensation and Penance: The Monetary Logic of Early Medieval Conflict Resolution. pp. 1–37. doi:10.1163/9789004466128_002.
Esders 2021, p. 6. Esders, Stefan (2021). "Chapter 1 Wergild and the Monetary Logic of Early Medieval Conflict Resolution". In Bothe, Lukas; Esders, Stefan; Nijdam, Han (eds.). Wergeld, Compensation and Penance: The Monetary Logic of Early Medieval Conflict Resolution. pp. 1–37. doi:10.1163/9789004466128_002.
Esders 2021, p. 15. Esders, Stefan (2021). "Chapter 1 Wergild and the Monetary Logic of Early Medieval Conflict Resolution". In Bothe, Lukas; Esders, Stefan; Nijdam, Han (eds.). Wergeld, Compensation and Penance: The Monetary Logic of Early Medieval Conflict Resolution. pp. 1–37. doi:10.1163/9789004466128_002.
Esders 2021, pp. 15–16. Esders, Stefan (2021). "Chapter 1 Wergild and the Monetary Logic of Early Medieval Conflict Resolution". In Bothe, Lukas; Esders, Stefan; Nijdam, Han (eds.). Wergeld, Compensation and Penance: The Monetary Logic of Early Medieval Conflict Resolution. pp. 1–37. doi:10.1163/9789004466128_002.