Rathsack, Mogens. “David Knowles: From Pachomius to Ignatius. A Study in the Constitutional History of the Religious Orders. Oxford, Clarendon Press, 1966. 98 S. 15 Sh”. Historisk Tidsskrift, bd. 12, januar 1969, https://tidsskrift.dk/historisktidsskrift/article/view/50889.