@article{Neipert2007,
   author = "C. Neipert and B. Space",
   title = "A Distributed Hyperpolarizability Model for Liquid Water",
   journal = "Computing Letters",
   year = "2007",
   volume = "3",
   number = "2", 
   pages = "431-440",
   url = "http://booksandjournals.brillonline.com/content/journals/10.1163/157404007782913291"
}