1) Masone, R., Oka, Y., Hong, Y.W. et al.: Cardiovascular effects of right atrial injection of protamine sulfate compared to left atrial injection. Anesthesiology. 57: A6, 1982
2) Iwatsuki, N., Matsukawa, S., Iwatsuki, K.: A weak negative inotropic effect of protamine sulfate upon the isolated canine heart muscle. Anesth. Analg. 59: 100-102, 1980