Paul S. Levy

The effect of vasodilator therapy on the clinical outcome of patients with primary pulmonary hypertension.

B. Brundage, S. Rich, P. Levy, 1985, Circulation.

Magnitude and implications of spontaneous hemodynamic variability in primary pulmonary hypertension.

S. Rich, G. D'Alonzo, D. Dantzker, 1985, The American journal of cardiology.

Reassessment of the effects of vasodilator drugs in primary pulmonary hypertension: guidelines for determining a pulmonary vasodilator response.

K. Rosen, S. Rich, W. Lam, 1983, American heart journal.