@article{JuremaKirschnerShields1993,
  author    = {Marcus W. Jurema and Karl N. Kirschner and George C. Shields},
  title     = {Modeling of magic water clusters (H2O)20 and (H2O)21H+ with the PM3 quantum-mechanical method},
  series   = {Journal of Computational Chemistry},
  volume    = {14},
  number    = {11},
  publisher = {John Wiley \& Sons},
  issn      = {0192-8651},
  doi       = {10.1002/jcc.540141109},
  pages     = {1326 -- 1332},
  year      = {1993},
  language  = {en}
}