@article{SchultSistemichHardt1995,
  author    = {Schult, O. W. B. and Sistemich, K. and Hardt, Arno},
  title     = {Plans for investigations of subthreshold K+ production in p+A collisions / O. W. B. Schult [u.a.]},
  series = {Nuclear Physics A. Vol. 583},
  journal   = {Nuclear Physics A. Vol. 583},
  issn      = {1873-1554 (E-journal); 0375-9474 (Print)},
  pages     = {629 -- 632},
  year      = {1995},
  language  = {en}
}
@article{HardtMartinMeissburgeretal.1978,
  author    = {Hardt, Arno and Martin, S. and Meißburger, J. and Retz, R. and Wimmer, J.},
  title     = {The cryopump system of the QQDDQ magnet spectrometer BIG KARL},
  series = {Vacuum},
  volume    = {28},
  journal   = {Vacuum},
  number    = {10-11},
  publisher = {Elsevier},
  address   = {Amsterdam},
  issn      = {1879-2715 (E-Journal); 0042-207X (Print)},
  doi       = {10.1016/S0042-207X(78)80026-8},
  pages     = {483},
  year      = {1978},
  abstract  = {Cryopumps without liquid nitrogen shielding are used to provide a vacuum of 10-6 torr in the spectrometer. The vacuum system is subdivided in three sections that can be separated by valves. The first section (scattering chamber) has a volume of 60 l, two rotation transmissions with 35 cm dia and a sliding seal that allows a rotation of 160° without deteriorating the vacuum. The second section includes the vacuum chambers inside the magnets with 6 × 80 cm cross-section and a length of 1200 cm. The third section (detector box) has a volume of 4300 l and contains a moveable detector system. The gas inside the detector with a pressure of 760 torr is separated from the vacuum by a 15 μm mylar foil with an area of 300 cm2. The detector box can be valved off by a valve with the dimension of 10 × 100 cm. The layout of system is given. The instrumentation and the interlock system are described. First experiences with this system are presented.},
  language  = {en}
}
@article{MartinHardtMeissburgeretal.1983,
  author    = {Martin, Siegfried A. and Hardt, Arno and Meissburger, J{\"u}rgen and Berg, Georg P. A. and Hacker, Ulrich and H{\"u}rlimann, Werner and R{\"o}mer, Josef G. M. and Sagefka, Thomas and Retz, Adolf and Schult, Otto W. B.},
  title     = {The QQDDQ magnet spectrometer "BIG KARL"},
  series = {Nuclear instruments and methods in physics research. Vol. 214, iss. 2-3},
  journal   = {Nuclear instruments and methods in physics research. Vol. 214, iss. 2-3},
  issn      = {0029-554x (E-Journal); 1872-9606 (E-Journal); 0167-5087 (Print)},
  pages     = {281 -- 303},
  year      = {1983},
  language  = {en}
}
@article{BalewskiBrauksiepeHardt1997,
  author    = {Balewski, J. and Brauksiepe, S. and Hardt, Arno},
  title     = {Threshold measurements at the internal experimental facility COSY-11 / J. Balewski [u.a.]},
  series = {Nuclear physics A. Vol. 626, iss. 1-2},
  journal   = {Nuclear physics A. Vol. 626, iss. 1-2},
  issn      = {1873-1554 (E-Journal) ; 0375-9474 (Print)},
  pages     = {85 -- 92},
  year      = {1997},
  language  = {en}
}