@Book{grid,
  author = 	 {Paul Murrell},
  title = 	 {R Graphics},
  publisher = 	 {CRC Press},
  year = 	 2006,
  series = {Computer Science and Data Analysis Series}
}



@Book{lattice,
  author = 	 {Deepayan Sarkar},
  title = 	 {Lattice: Multivariate Data Visualization with R},
  publisher = 	 {Springer},
  year = 	 2008,
  note = 	 {ISBN 978-0-387-75968-5}}



@Book{grz,
  title = 	 {The New S Language: A Programming Environment for Data Analysis and Graphics},
  publisher =   {Wadsworth \& Brooks/Cole},
  author = 	 {Becker, Rick and Chambers, John and Wilks, Alan},
  year = 	 1988,
  note = 	 {ISBN 053409192X}}

