D. C. NICHOLSON

Structure of d-Urobilin

C. H. GRAY, D. C. NICHOLSON, C. Gray, 1957, Nature.

The IX-α Structure of the Common Bile Pigments

C. Gray, R. Nicolaus, D. Nicholson, 1958, Nature.

Dextrorotatory Urobilin-IXα and Racemic d-Urobilin

C. Gray, D. Nicholson, D. C. NICHOLSON, 1958, Nature.