In Vitro Comparison of the Blood Handling by the Constrained Vortex and Twin Roller Blood PumpsHarry R. Hoerr, Michael F. Kraemer, J. Lynne Williams, Mary L. Sherman, Jeffrey B. Riley, Jeffrey C. Crowley and Scott W. SoronenJ Extra Corpor Technol, 19 3 (1987) 316-321DOI: https://doi.org/10.1051/ject/1987193316