@article{ZiemonsHerzogBosettietal.1992, author = {Ziemons, Karl and Herzog, H. and Bosetti, P. and Feinendegen, L. E.}, title = {Iterative image reconstruction with weighted pixel contribution to projection elements}, series = {European Journal of Nuclear Medicine}, volume = {19}, journal = {European Journal of Nuclear Medicine}, number = {8}, isbn = {1619-7089}, pages = {588 -- 588}, year = {1992}, language = {en} } @article{Ziemons1992, author = {Ziemons, Karl}, title = {Muoproduction of J/ψ and the gluon distribution of the nucleon}, series = {Zeitschrift f{\"u}r Physik C Particles and Fields}, volume = {56}, journal = {Zeitschrift f{\"u}r Physik C Particles and Fields}, number = {1}, isbn = {1431-5858}, pages = {21 -- 28}, year = {1992}, abstract = {Measurements are presented of the inclusive distributions of the J/Ψ meson produced by muons of energy 200 GeV from an ammonia target. The gluon distribution of the nucleon has been derived from the data in the range 0.04