@misc{KetkarEtAl:patent13,
  author	= {Ketkar, Nikhil Shirish and Mishra, Gaurav and Bawa, Jaskaran Singh and Crovella, Mark},
  title		= {Compressed set representation for sets as measures in {OLAP} cubes},
  URL		= {http://patft.uspto.gov/netacgi/nph-Parser?patentnumber=8533167},
  year		= {2013},
  howpublished	= {US Patent Number 8,533,167, issued September 10, 2013}
}