David S. Bredt, Paul M. Hwang, Charles E. Glatt, Charles Lowenstein, Randall R. Reed, Solomon H. Snyder,
Cloned and expressed nitric oxide synthase structurally resembles cytochrome P-450 reductase. Nature. ,vol. 351, pp. 714- 718 ,(1991) ,
10.1038/351714A0