Analysis of information sources in references of the Wikipedia article "Medici Bank" in English language version.
{{cite web}}: CS1 maint: archived copy as title (link) The first party gave the second a certain sum of gold, and the second promised to return the gold in Constantinople, with a small penalty if he failed to do so; neither intended to travel, and the penalty was in effect interest.{{cite web}}: CS1 maint: archived copy as title (link) The first party gave the second a certain sum of gold, and the second promised to return the gold in Constantinople, with a small penalty if he failed to do so; neither intended to travel, and the penalty was in effect interest.