@misc{Euler_Leonhard_(1707-1783)_Institutiones,
 author={Euler, Leonhard (1707-1783)},
 howpublished={online},
 publisher={Imperatorskaâ akademiâ nauk},
 publisher={Johann Gottfried Michaelis},
 language={lat},
 type={starodruk},
 title={Institutiones Calculi Differentialis Cum Eius Vsu In Analysi Finitorum Ac Doctrina Serierum},
}