EFFECTS OF VARIOUS NITRIC OXIDE DONATING AGENTS ON THE CONTRACTILITY AND THE CYCLIC NUCLEOTIDE TURNOVER OF HUMAN SEMINAL VESICLES <I>IN VITRO</I> Article Heuer O., Uckert S., Machtens S.A., Stief C.G., Tsikas D., Frolich J.C., Jonas U. Andrologia. John Wiley & Sons. Vol. 33. 2001. P. 171-183