Dihydro-Sperorenone, a new progestogen with antimineralocorticoid activity: effects on ovulation, electrolyt excretion, and the renin-aldosterone system in normal women. - Oelkers,W.; Berger,V.; Bolik,A.; Bähr,V.; Hazard,B.; Beier,S.; Elger,W.; Heithecker,A. (J Clin Endocrinol Metab, 1991)