关于Hurewicz 1939年《Asphärische Räume》文献及相关同伦论定理的咨询

Hey folks, I'm on the hunt for a literature result I stumbled upon two months ago but failed to properly note down at the time. The only info I jotted down is this theorem:

Theorem (Hurewicz 1939, Asphärische Räume). Let $X,Y$ be spherical spaces. Then the set of homotopy classes of maps $[X,Y] = \frac{Hom(\pi_1(X),\pi_1(Y))}{Inn(\pi_1(Y))}$ where $Inn(\pi_1(Y))$ are the inner automorphisms of $\pi_1(Y)$.

I haven't been able to track down the paper Asphärische Räume yet, and I really want to check the exact definitions used to state this theorem, plus work through its proof. If any of you have more details about this result, or know how to access the original paper (or have references that cover it thoroughly), please share your insights!

备注：内容来源于stack exchange，提问作者Esteban Ricardo Castillo