@article{ZastrowRieder1980,
  author    = {Zastrow, Udo and Rieder, G.},
  title     = {Bracketing eigenvalues of an oscillating elastic body by integral equations},
  series = {Bracketing of eigenfrequencies of continous structures : Euromech Colloquium, no. 112, M{\´a}traf{\"u}red (Hungary), 21 - 23 February, 1979 / ed. by {\`A}. Bosznay},
  journal   = {Bracketing of eigenfrequencies of continous structures : Euromech Colloquium, no. 112, M{\´a}traf{\"u}red (Hungary), 21 - 23 February, 1979 / ed. by {\`A}. Bosznay},
  publisher = {Akad. Kiad{\´o}},
  address   = {Budapest},
  isbn      = {963-05-2625-5},
  pages     = {421 -- 434},
  year      = {1980},
  language  = {en}
}
@article{SammFaissnerFrenzeletal.1980,
  author    = {Samm, Doris and Faissner, H. and Frenzel, E. and Heinrigs, W.},
  title     = {Limit on axion decay into an electron pair / H. Faissner, E. Frenzel, W. Heinrigs, A. Preussger, D. Samm und U. Samm},
  series = {Physics Letters B. Vol. 96 (1980), H. Issues 1-2},
  journal   = {Physics Letters B. Vol. 96 (1980), H. Issues 1-2},
  pages     = {201 -- 205},
  year      = {1980},
  language  = {en}
}
@article{SammFaissnerFrenzeletal.1980,
  author    = {Samm, Doris and Faissner, H. and Frenzel, E. and Heinrigs, W.},
  title     = {Observation of the two-photon decay of a light penetrating particle / H. Faissner, E. Frenzel, W. Heinrigs, A. Preussger, D. Samm und U. Samm},
  series = {Physics Letters B. Vol. 103 (1980), H. Issues 3},
  journal   = {Physics Letters B. Vol. 103 (1980), H. Issues 3},
  pages     = {234 -- 240},
  year      = {1980},
  language  = {en}
}
@article{HagemannHeroGonser1980,
  author    = {Hagemann, Hans-J{\"u}rgen and Hero, A. and Gonser, U.},
  title     = {The valence change of Fe in BaTiO3 studied by M{\"o}ßbauer effect and gravimetry. Hagemann, H. J.; Hero, A.; Gonser, U.},
  series = {Physica Status Solidi (A) - Applied Research. 61 (1980)},
  journal   = {Physica Status Solidi (A) - Applied Research. 61 (1980)},
  isbn      = {0031-8965},
  pages     = {63 -- 72},
  year      = {1980},
  language  = {en}
}