Nicetas Choniates imperatorem Alexium Angelum anno 1200 ait auro oblato Assassinum quendam suasisse ut Rucratinum, sultanum Iconiensem trucidaret; Assassinum autem antequam id perfecisset captum esse.[1]
Charles M. Brand, Byzantium Confronts the West, 1180-1204. Cambridge Mass.: Harvard University Press, 1968
Dimitri Korobeinikov, "A sultan in Constantinople: the feasts of Ghiyath al-Din Kay-Khusraw I" in Leslie Brubaker, Kalliroe Linardou, edd., Eat drink and be merry (Luke 12:19): food and wine in Byzantium (Aldershot: Ashgate, 2007) pp. 93-108
James M. Powell, Innocent III and Alexius III: a Crusade plan that failed in Marcus Bull, Norman Houseley, edd., The Experience of Crusading vol. 1 (Cantabrigiae, 2003) pp. 96-102
K. Varzos, Η γενεαλογία των Κομνηνών (2 voll. Thessalonicae, 1984 1A1B2) no. 180