1) Chen, C.H., Johnson, A.G., Kasai, N., Key, B.A., Levin, J., and Nowotny, A. 1973. Heterogeneity and biological activity of endotoxic glycolipid from Salmonella minnesota R595. J. Infect. Dis. 128 : (suppl.) S43-S51.
2) Cochin, J., and Axelrod,.J. 1959. Biochemical and pharmacological change in the rat following chronic administration of morphine, nalorphine and normorphine. J. Pharmacol. Exp. Ther. 125 : 105-115.
3) Galanos, C., Luderitz, O., and Westphal, O. 1969. A new method for the extraction of R-lipopoly saccharides. Eur. J. Biochem. 9 : 245-249.
4) Galanos, C., Rietschel, E.T., LUderitz, O, and Westphal, O. 1971. Interaction of lipopoly saccharide and lipid A with complement. Eur. J. Biochem. 19 : 143-152.
5) Gmeiner, J., Luderitz, O., and Westphal, O. 1969. Biochemical studies on lipopolysaccharides of Salmonella R mutants. 6. Investigation on the structure of the lipid A component. Eur. J. Biochem. 7 : 370-379.