@article {cite-key,
	title = {Description of a new species of Mormyrus},
	journal = {Proceedings of the General Meetings for Scientific Business of the Zoological Society of London},
	volume = {1864 (pt 1)},
	year = {1864},
	month = {July},
	pages = {22 (Pl. 2)},
	keywords = {Mormyrus petersii},
	author = {G{\"u}nther, Albert C. L. G.}
}
@article {cite-key,
	title = {Die Familie der Mormyren. Eine anatomisch-zoologische Abhandlung.},
	journal = {M{\'e}moires de l{\textquoteright}Acad{\'e}mie Imp{\'e}riale des Sciences de St. P{\'e}tersbourg (7i{\`e}me S{\'e}rie)},
	volume = {7},
	number = {4},
	year = {1864},
	pages = {p.153},
	keywords = {Petrocephalus pictus},
	url = {https://www.biodiversitylibrary.org/page/13677285},
	author = {Marcusen, J.}
}
