Loveluck, C. (2018). Co-opetition and urban worlds, c. AD 1050-1150: archaeological and textual case studies from northwestern Europe. In R. Le Jan, G. Bührer-Thierry, & S. Gasparri (Eds.), Rivaliser, cooperer: vivre en competition dans les societes du haut Moyen Age. Brepols. https://doi.org/10.1484/M.HAMA-EB.5.114228