> For the complete documentation index, see [llms.txt](https://overleaf-pro.ayaka.space/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://overleaf-pro.ayaka.space/latex/it/domande-e-risposte/66-i-m-trying-to-include-urls-in-my-.tex-or-.bib-but-i-got-an-error-missing-inserted.md).

# Sto cercando di includere URL nel mio .tex o .bib, ma ho ricevuto un errore "Missing $ inserted"

Il tuo URL potrebbe contenere alcuni caratteri di underscore `_`, che sono caratteri speciali in LaTeX — sono l'operatore di pedice in modalità matematica, ad es. `$x_i$` produrrà $$x\_i$$. Di solito, se vuoi usare un carattere underscore letterale nel testo normale, dovrai scriverlo precedendolo con un carattere di escape come `\_`.

Per fortuna c'è un modo più semplice per includere URL con underscore. Se aggiungi `\usepackage{url}` o `\usepackage{hyperref}` subito prima del tuo `\begin{document}`, puoi poi scrivere:

```latex
\url{https://www.example.com/url_with_underscore}
```

nel tuo documento.

Per ulteriori dettagli, fai riferimento all'articolo di assistenza di Overleaf [Missing $ inserted](/latex/it/errori-latex/25-missing-inserted.md).


---

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