H. Helmholtz (1853) "Über einige Gesetze der Vertheilung elektrischer Ströme in körperlichen
Leitern mit Anwendung auf die thierisch-elektrischen Versuche" [Some laws concerning the
distribution of electrical currents in conductors with applications to experiments on animal
electricity], Annalen der Physik und Chemie, vol. 89, no. 6, pages 211–233,
available online http://gallica.bnf.fr/ark:/12148/bpt6k151746.image.f225.langFRArchived 2009-08-03 at the वेबैक मशीन
rice.edu
ece.rice.edu
Don H. Johnson (April 2003) "Equivalent circuit concept: the voltage-source equivalent," Proceedings of the IEEE, vol. 91, no. 4, pages 636-640. Available on-line at: http://www.ece.rice.edu/~dhj/paper1.pdfArchived 2017-08-13 at the वेबैक मशीन .
web.archive.org
H. Helmholtz (1853) "Über einige Gesetze der Vertheilung elektrischer Ströme in körperlichen
Leitern mit Anwendung auf die thierisch-elektrischen Versuche" [Some laws concerning the
distribution of electrical currents in conductors with applications to experiments on animal
electricity], Annalen der Physik und Chemie, vol. 89, no. 6, pages 211–233,
available online http://gallica.bnf.fr/ark:/12148/bpt6k151746.image.f225.langFRArchived 2009-08-03 at the वेबैक मशीन
Don H. Johnson (April 2003) "Equivalent circuit concept: the voltage-source equivalent," Proceedings of the IEEE, vol. 91, no. 4, pages 636-640. Available on-line at: http://www.ece.rice.edu/~dhj/paper1.pdfArchived 2017-08-13 at the वेबैक मशीन .