Wall, Bill (2 July 2007). "Religion and Chess". Chess.com. Retrieved 21 May 2011.
doi.org
Goering, Joseph; Taylor, Daniel S. (1992). "The Summulae of Bishops Walter de Cantilupe (1240) and Peter Quinel (1287)". Speculum. 67 (3): 576–594. doi:10.2307/2863657. JSTOR2863657. S2CID163077298.
jstor.org
Goering, Joseph; Taylor, Daniel S. (1992). "The Summulae of Bishops Walter de Cantilupe (1240) and Peter Quinel (1287)". Speculum. 67 (3): 576–594. doi:10.2307/2863657. JSTOR2863657. S2CID163077298.
semanticscholar.org
api.semanticscholar.org
Goering, Joseph; Taylor, Daniel S. (1992). "The Summulae of Bishops Walter de Cantilupe (1240) and Peter Quinel (1287)". Speculum. 67 (3): 576–594. doi:10.2307/2863657. JSTOR2863657. S2CID163077298.