The Use of Skin Plethysmography to Monitor Counter-Pulsation by the Intra-Aortic Balloon PumpT. G. Williams, A. Bartoli, K. V. Woollard and A. R. MakeyJ Extra Corpor Technol, 14 1 (1982) 305-308DOI: https://doi.org/10.1051/ject/1982141305