Does anybody know the paper where the Brouwer fixed point theorem first appeared?
Wikipedia and other articles available online have no reference. Schauder's paper about his fixed point theorem is available online at
but, even if I don't speak a word of German, it seems to me that there is no reference.
In Brouwer's wikipage
there are some references to Brouwer's papers, but only focused on his contribution to philosophy and philosophy of math.
Thanks in advance,