Sherrid MV, Chaudhry FA, Swistel DG (11 november 2003). ”Obstructive hypertrophic cardiomyopathy: echocardiography, pathophysiology, and the continuing evolution of surgery for obstruction”. Ann Thorac Surg. "75" (2): ss. 620–32. doi:10.1016/S0003-4975(02)04546-0. PMID 12607696.
Sherrid MV, Chaudhry FA, Swistel DG (11 november 2003). ”Obstructive hypertrophic cardiomyopathy: echocardiography, pathophysiology, and the continuing evolution of surgery for obstruction”. Ann Thorac Surg. "75" (2): ss. 620–32. doi:10.1016/S0003-4975(02)04546-0. PMID 12607696.