documentstyle[11pt]{artigo}

Solved line error message 15 LaTeX Error Can be used only in

Inline enumerate (inparaenum)

document classes - What are the available documentclass types and their uses? - TeX - LaTeX Stack Exchange

document classes - What are the available documentclass types and their uses? - TeX - LaTeX Stack Exchange

Texifier · Docs · Working with single-file documents

Creating a document - Getting Started with LaTeX - Research Guides at New York University

LaTeX documentclass options illustrated – texblog

LaTeX: basics – Delphine's blog

Vector graphic eps works for documentclass article, not for book - TeX - LaTeX Stack Exchange