Ahh awesome, I'll put him on my list! I didn't even think about it, but since you read Portuguese one I recommend a lot is Salazar's Como Se Levanta Um Estado. It was released in 1937, it is a really interesting insight into his worldview and the regime leading up to WW2. Available here on the internet archive: https://archive.org/details/como-se-levanta-um-estado-salazar_202104

For Fascism, some of the cornerstones in the historiography of Comparative Fascism are:

Fascism - Comparison and Definition by Stanley Payne

A History of Fascism 1915-1945 by Stanley Payne

The Nature of Fascism by Roger Griffin

The Anatomy of Fascism by Robert Paxton

The Birth of Fascist Ideology by Zeev Sternhell

Neither Right nor Left: Fascist Ideology in France by Zeev Sternhell

António Costa Pinto is my favorite author writing in the field still. He has some great books on the Portuguese Fascist movement, Estado Novo, and Corporatism as a system of economic organization (both with and separate from Fascism political organization) in the 20th century. I haven't read it yet, but he has a newer book on Latin American fascism that may cover Brazil. Some of my favorites by him (including edited volumes) are The Blue Shirts: Portuguese Fascists and the New State, Rethinking Fascism and Dictatorship in Europe, and Corporatism and Fascism: The Corporatist Wave in Europe.

Edit: Costa Pinto has two on Latin America, Latin American Dictatorships in the Era of Fascism: The Corporatist Wave, and Authoritarianism and Corporatism in Europe and Latin America: Crossing Borders.