# How to enter Excerpt in biblatex?

Are any of the entry types in biblatex particularly well suited for referencing an excerpt? For example:

``````Lucas, Édouard. Recherches sur plusieurs ouvrages de Léonard de Pise et sur diverses
questions d’arithmétique supérieure. (Extrait du Bullettino di bibliografia e di storia
delle scienze matematiche e fisiche. Tomo X. — Marzo, Aprile e Maggio 1877). — Rome :
Imprimerie des sciences mathématiques et physiques, 1877. — 122 p. (in Fr.)
``````

Where the above is an excerpt from Bullettino di bibliografia e di storia delle scienze matematiche e fisiche., but is now published separately.

Here is the link to the cover of this document.

I thought of using inbook, but I am not sure if that fits exactly.

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Could this not be handled using a book entry with the excerpt information in a subtitle/titleaddon/note field? –  Audrey May 8 '11 at 4:46
I agree with Audrey. At 122 pages published in a standalone form, your specific text looks to me more like a book or a booklet. If Biblatex had support for an `origjournal` field, I'd recommend coding, but your best option for now is adding info to a note. –  James Clawson May 18 '11 at 14:52

I tend to use a different entry for this kind of situation, something like `orig-REFNAME`. The result is to bibliographic entries in your Bibliography, what I'm afraid is not what you need since what really matters here is the standards you have to follow..., like @Martigan said.

Here's an example of how i would do the references:

``````@book{REFNAME,
author = {Lucas, Édouard},
title = {Recherches sur plusieurs ouvrages de Léonard de Pise et sur diverses questions d’arithmétique supérieure},
publisher = {Imprimerie des sciences mathématiques et physiques},
year = {1877},
totalpages = {122},
language = {french},
}
@article{orig-REFNAME,
crossref = {REFNAME}
journal = {Bullettino di bibliografia e di storia delle scienze matematiche e fisiche},
volume = {Tomo X},
date = {1877-03/1877-05},
}
``````

But if you need that the main entry refers the original publication, I would add an `addendum = {Extrait du \textcite{orig-REFNAME}}`, which impossibilitates the use of the `crossref`. In this case, I would do something like this:

``````@book{REFNAME,
author = {Lucas, Édouard},
title = {Recherches sur plusieurs ouvrages de Léonard de Pise et sur diverses questions d’arithmétique supérieure},
publisher = {Imprimerie des sciences mathématiques et physiques},
year = {1877},
totalpages = {122},
language = {french},
}
@article{orig-REFNAME,
author = {Lucas, Édouard},
title = {Recherches sur plusieurs ouvrages de Léonard de Pise et sur diverses questions d’arithmétique supérieure},
journal = {Bullettino di bibliografia e di storia delle scienze matematiche e fisiche},
volume = {Tomo X},
date = {1877-03/1877-05},
}
``````

Hope it helps!

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