Analysis of information sources in references of the Wikipedia article "Problem of two emperors" in English language version.
regi Grecorum, qui etiampropternimium fastum divitiarum suarum imperatorem
the king of the Greeks, who, even out of the extreme pride of his wealth, calls himself emperor
— Arnold of Lübeck, Arnoldi Chronica Slavorum, Latin:25f. German:23
{{cite book}}: ISBN / Date incompatibility (help)regi Grecorum, qui etiampropternimium fastum divitiarum suarum imperatorem
the king of the Greeks, who, even out of the extreme pride of his wealth, calls himself emperor
— Arnold of Lübeck, Arnoldi Chronica Slavorum, Latin:25f. German:23