I am writing a document and I want to include a reference of a person called Catalão. I put the line related to the author in the entry on bibtex as:
author = {P. S. Catal\~{a}o}
However, when I compile my document on latex, I get the following outcome:

How can correctly insert the character ã on bibtex?
author = {P. S. Catal{\~a}o}(see also https://texfaq.org/FAQ-bibaccent) – moewe Jun 25 '18 at 14:43