1. An Assessment of the Azostix Strip Test;Bold;J Clin Pathol,1970
2. Some Observations on the Use of Azostix for the Determination of Blood Urea Nitrogen;Eby;Can Med Assoc J,1969
3. Blood Urea Estimation in General Practice;Knox;Practitioner,1969
4. Problems of Spectrum and Bias in Evaluating the Efficacy of Diagnostic Tests;Ransohoff;N Engl J Med,1978
5. Clinical Epidemiology;Martin;Can Vet J,1987