1. Dubois, E. L. (1953). Ann. intern. Med., 38, 1265.
2. Duijn, P. van (1956). J. Histochem. Cytochem., 4, 55.
3. "Statistical Methods for Research Workers;Fisher, R.A.,1954
4. Hargraves, M. M., Richmond, H., and Morton, R. (1948). Proc. Mayo Clin., 23, 25.
5. "Systemic Lupus Erythematosus". Williams and Wilkins, Baltimore;Harvey, A.McG; Shulman, L.E.; Tumulty, P.A.; Conley, C.L.; Schoenrich, E.H.,1955