BrenaSF, & KochDL (1975) A pain estimate model for the quantification and classification of chronic pain states. Anesthesiology Review2: 8–13.
2.
ParrisWCV (1985) Nerve block therapy. Clinics in Anesthesiology3: 93–109.
3.
MellanderS, & NordenfeltI (1970) Comparative effects of dihydroergotamine and noradrenaline on resistance, exchange and capacitance functions in the peripheral circulation. Clin Sci39: 183–201.