1. An improved method for the determination of urinary coproporphyrin and evaluation of the factors influencing the analysis;Schwartz;J. Lab. Clin. Med.,1951
2. Experimental porphyria II. Type produced by lead, phenylhydrazine and light;Schwartz;Proc. Soc. Exptl. Biol. Med.,1952
3. Solubility of uroprophyrin I in ethyl acetate;Dresel;Nature,1954
4. A micromethod for the quantitative determination of the urinary coproporphyrin isomers (I and III);Schwartz;J. Biol. Chem.,1947
5. Studies of the uroporphyrins. I. The purification of uroporphyrin I and the nature of Waldenstrom's uroporphyrin, as isolated from porphyria material;Grinstein;J. Biol. Chem.,1945