[1] S. Schreier:
On the Flow in the Vaneless Diffuser of a Centrifugal Compressor. Transactions of the ASME, Journ. of App. Mech., December 1962.
Zbl 0112.18403
[2] N. Athanansiades: Potential Flow through Spiral Casings. Technische Hochschule Zürich, Verlag Lehman, 1961.