%0 Journal Article %T Synthesis, Characterization and Antifertility Activity of New Unsymmetrical Macrocyclic Complexes of Tin(II) %A Kripa Sharma %A S. C. Joshi %A R. V. Singh %J Metal-Based Drugs %D 2000 %I %R 10.1155/mbd.2000.237 %U http://dx.doi.org/10.1155/MBD.2000.237