https://docs.lib.purdue.edu/icec/1239/
"Rotary Volumetric Machines with a Rotating Piston/Cylinder" by Z. Gnutek and S. Pietrowicz
By Z. Gnutek and S. Pietrowicz, Published on 01/01/98
https://docs.lib.purdue.edu/icec/1161/
"Heat Exchange in the Working Chamber of a Multivane Compressor" by Z. Gnutek and E. Kalinowski
By Z. Gnutek and E. Kalinowski, Published on 01/01/96