@article{45124,
      recid = {45124},
      author = {Piper, H. W.},
      title = {The active universe.},
      publisher = {University of London, Athlone Press;},
      address = {[London]},
      pages = {243 p.;},
      year = {1962},
      url = {http://library.usi.edu/record/45124},
}