1. Nonsteroid ovarian hormones. III. The properties of relaxin preparations purified by counter-current distribution;Frieden;J. Biol. Chem.,1960
2. Characterization of pituitary and peptide hormones by electrophoresis in starch eel;Barrett;J. Biol. Chem.,1962
3. Nonsteroid ovarian hormones. II. An improved method for the preparation of relaxin;Frieden;J. Biol. Chem.,1957
4. Nonsteroid ovarian hormones. IV. Fractionation of relaxin preparations upon DEAE-cellulose;Frieden;Tufts Folia Medica.,1961
5. Purification of relaxin by chromatography and counter-current distribution;Frieden;Federation Proc.,1962