1. Radioimmunoassay of plasma progesterone;Abraham;J. Clin. Endocrinol. Metab.,1971
2. Determination of the source of immunoreactive relaxin in the cat;Addiego;Biol. Reprod.,1987
3. Relaxin in porcine corpora lutea during pregnancy and after hysterectomy;Anderson;Am. J. Physiol.,1973
4. Anderson, L.L., Gazal, O.S., Diamini, B., Li, Y., 1995. The role of relaxin in ruminants. In: MacLennan, A.H., Tregear G.W., Bryant-Greenwood, G.D. (Eds.), Progress in Relaxin Research. World Scientific Publishing, Singapore, pp. 428–438.
5. Serum and urinary hormones during pregnancy and the peri- and postpartum period in an Asian elephant (Elephas maximus);Brown;Zoo Biol.,1995