1. Serodiagnostic de la fievre typhoide a-propos d’une modification par M. M. C. Nicolle et A. Halipre;Widal;Bull Soc Med Hop Paris,1896
2. Typhoid: clinical analysis of three hundred and sixty cases;Stuart;Arch Intern Med,1946
3. Interpretation of serologic tests for typhoid fever;Schroeder;JAMA,1968
4. A critical assessment of the conventional Widal test in a diagnosis of typhoid and paratyphoid fever;Sen;Indian J Med Res,1969
5. Endemic typhoid fever —a diagnostic pitfail;Wicks;Q J Med,1971