1. The Reaction of Tubercular Serums to Phenols;Montank I. A.;Proceedings of Society for Experimental Biology and Medicine,1924
2. Study of Clinical Findings and Ring Test in 500 Cases Examined for Tuberculosis;Meyers J. A. A.;American Review of Tuberculosis,1925
3. LiuandJ. H.Foster: “Ring Test For Tuberculosis ”China Medical JournalSeptember 1926 page828.
4. J. H.DanielsandG.Bauer: “Ring Test for Tuberculosis ”China Medical Journal May page424. Urochromogen Reaction.
5. P. B.Hawk: “Practical Physiological Chemistry ”8th edition page476(includes a most useful bibliography).