@article{SammFaissnerHeinrigsetal.2005,
  author    = {Doris Samm and H. Faissner and W. Heinrigs and A. Preussger},
  title     = {Search for the two-photon decay of a light penetrating particle from a 590 MeV proton beam dump / Faissner, H.; Heinrigs, W.; Preussger, A.; Reitz, J.; Samm, D. [u.a.]},
  journal   = {Zeitschrift f{\"u}r Physik, C Particles and Fields. 44 (1989), H. 4},
  pages     = {557 -- 566},
  year      = {2005},
}