| The Missionary Man: Archbishop Anders Sunesen and the Baltic Crusade, 1206–21 TK Nielsen Crusade and Conversion on the Baltic Frontier 1150–1500, 95-117, 2017 | 24 | 2017 |
| Mission and Submission: Societal Change in the Baltic in the Thirteenth Century TK Nielsen Medieval History Writing and Crusading Ideology, 216-231, 2005 | 15 | 2005 |
| Celestine III and the North TK Nielsen Pope Celestine III (1191–1198), 177-196, 2016 | 12 | 2016 |
| The making of new cultural landscapes in the medieval Baltic TK Nielsen Medieval Christianity in the North: New Studies, 121-153, 2013 | 11 | 2013 |
| Pope Innocent III and Denmark TK Nielsen, KV Jensen Innocenzo III; 2, 1133-1168, 2003 | 10 | 2003 |
| Henry of Livonia on woods and wilderness TK Nielsen Crusading and Chronicle Writing on the Medieval Baltic Frontier, 157-178, 2016 | 9 | 2016 |
| Crusading on the edge: ideas and practice of crusading in Iberia and the Baltic region, 1100-1500 TK Nielsen, I Fonnesberg-Schmidt Brepols Publishers, 2016 | 9 | 2016 |
| Sterile Monsters? Russians and the Orthodox Church in the Chronicle of Henry of Livonia TK Nielsen na, 2009 | 7 | 2009 |
| Pope Innocent III and Denmark, Sweden, and Norway TK Nielsen Analecta romana instituti danici 28, 7, 2001 | 6 | 2001 |
| 15 Providential History in the Chronicles of the Baltic Crusades TK Nielsen The Uses of the Bible in Crusader Sources, 361-402, 2017 | 4 | 2017 |
| Archbishop Anders Sunesen and Pope Innocent III: Papal Privileges and Episcopal Virtues TK Nielsen Archbishop Absalon of Lund and his world, 2000 | 4 | 2000 |
| Vicarius Christi, Plenitudo Potestatis og Causae Maiores TEOLOGI OG JURA HOS PAVE INNOCENS III.(1198-1216) OG ÆRKEBISKOP ANDERS SUNESEN (1201-1223) TK Nielsen Historisk tidsskrift 94, 1-29, 1994 | 4 | 1994 |
| Cølibat og kirketugt: studier i forholdet mellem ærkebisp Anders Sunesen og pave Innocens III TK Nielsen Aarhus Univ.-Forl., 1993 | 4 | 1993 |
| Cølibat og kirketugt TK Nielsen Studier i forholdet mellem Innocens III og Anders Sunesen, 1198 1120, 0 | 4 | |
| From ‘Superstitious Veneration’ to ‘War to Defend Christendom’. The Crusades in the Encyclopaedia Britannica (1771–2018) M Horswell The Crusades: History and Memory: Proceedings of the Ninth Conference of the …, 0 | 4 | |
| Dannebrog: 1219 TK Nielsen Aarhus Universitetsforlag, 2018 | 3 | 2018 |
| Struggling for ecclesiastical independence in the North 1 TK Nielsen Pope Innocent II (1130-43), 205-225, 2016 | 3 | 2016 |
| Praktik i gymnasieskolen? TK Nielsen Nyhedsbrev fra Netværkscentret, AAU: Formidling af forskning og samarbejde, 1-2, 2004 | 3 | 2004 |
| Mission, omvendelse og samfundsomvæltning i Baltikum i 1200-tallet TK Nielsen Krig, korstog og kolonisering, 89-111, 2000 | 3 | 2000 |
| Cølibat og kirketugt: Studier i forholdet mellem Innocens III og Anders Sunesen, 1198-1220 TK Nielsen Århus Universitetsforlag, 1993 | 3 | 1993 |
