Siemens, Charles William (1867). "II. On the conversion of dynamical into electrical force without the aid of permanent magnetism". Proceedings of the Royal Society of London. 15: 367–369. doi:10.1098/rspl.1866.0082.
Wheatstone, Charles (1867). "III. On the augmentation of the power of a magnet by the reaction thereon of currents induced by the magnet itself". Proceedings of the Royal Society of London. 15: 369–372. doi:10.1098/rspl.1866.0083.
Dynamo-Electric Machinery: A Manual for Students of Electrotechnics, by Silvanus P. Thompson, 1901, 8th American Edition, Ch. 31, Management of Dynamos, pp. 765–777, Free digital access from Google Books, Cite search method: "dynamo" "coupling" via Google Scholar
siemens.com
Volker Leiste: 1867 – Fundamental report on dynamo-electric principle before the Prussian Academy of Sciences siemens.comArchived 2017-09-01 at the Wayback Machine
Volker Leiste: 1867 – Fundamental report on dynamo-electric principle before the Prussian Academy of Sciences siemens.comArchived 2017-09-01 at the Wayback Machine