In this expository article, it is mentioned that Emil Artin proved Hilbert's 17th problem in his paper:
E. Artin, Uber die Zerlegung definiter Funktionen in Quadrate, Abh. math. Sem. Hamburg 5(1927), 110–115.
Not being able to speak German, my question is
Does anyone know if English translation of this paper exists somewhere? Or perhaps some link to a book (or article, blog post, etc.) where this proof is given in English?
My google searches have been in vain. Note that I am only interested in Artin's proof. (There is a algorithmic proof due to Dellzel, which is in English).
Thanks!
P.S. I have previously asked for English translation of another paper by E. Artin.
I recommend this:
The Honors Class: Hilbert's Problems and Their Solvers [Paperback] Ben Yandell
It's available on Amazon.