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@Online{hammarstrom2019glottolog,
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	organization = {Jena: Max Planck Institute for the Science of Human History},
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	editor = {Hammarström, Harald and Forkel, Robert and Haspelmath, Martin}
}

@Book{heath1978ngandi,
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	author = {Heath, Jeffery}
}

@book{mathiassen1996short,
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@Book{rae2010nueva,
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	series = {Nuevas obras Real Academia},
	year = {2010},
	title = {Nueva Gramatica Lengua Española},
	author = {{Real Academia de la Lengua Española}}
}