@article{Vovchenko:1989kp, author = "Vovchenko, V. G. and others", title = "{Polarization parameters A(000n) and A(00nn) in elastic proton proton scattering in the energy region 690-MeV to 890-MeV}", journal = "Sov. J. Nucl. Phys.", volume = "49", pages = "446--453", year = "1989" }