**Question 1.**
Does Élie Cartan's paper
[Les groupes réels simples, finis et continus,
Ann. Sci. École Norm. Sup. (3) 31 (1914), 263–355](http://www.numdam.org/item/?id=ASENS_1914_3_31__263_0)
contain a classification of  $\Bbb C$-linear involutions of simple complex Lie algebras?

**Question 2.**
If not, what kind of a similar/related classification does it contain?

**Question 3.**
In what book/paper is this Cartan's paper discussed?

MathSciNet contains only the title, while [zbMATH](https://zbmath.org/?q=an%3A45.1408.03)
contains a review: a translation into German of a few lines from the introduction.