Magnetic Monopole Search at high altitude with the SLIM experiment
  The SLIM experiment was a large array of nuclear track detectors located at the Chacaltaya high altitude Laboratory (5230 m a.s.l.). The detector was in particular sensitive to Intermediate Mass Magnetic Monopoles, with masses 10^5 < M <10^{12} GeV. From the analysis of the full detector exposed for more than 4 years a flux upper limit of 1.3 x 10^{-15} cm^{-2} s^{-1} sr^{-1} for downgoing fast Intermediate Mass Monopoles was established at the 90% C.L. 
S. Balestra, S. Cecchini, M. Cozzi, M. Errico, F. Fabbri, G.   Giacomelli, R. Giacomelli, M. Giorgini, A. Kumar, S. Manzoor,...