@article {cite-key,
	title = {Vorl{\"a}ufige Mittheilung aus einer Abhandlung {\"u}ber die Familie der Mormyren},
	journal = {Bulletin de la Classe Physico-Math{\'e}matique de l{\textquoteright}Acad{\'e}mie Imp{\'e}riale des Sciences de St. P{\'e}tersbourg},
	volume = {12},
	number = {1},
	year = {1854},
	pages = {1{\textendash}14},
	keywords = {Mormyridae},
	url = {https://biodiversitylibrary.org/page/45985327},
	author = {Marcusen, J.}
}
@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.}
}
