@MASTERSTHESIS{Camillo,
         author="Camillo Jorge Santos {Oliveira} and {Arnaldo de Albuquerque} Ara\'ujo and Carlos Alberto {SEVERIANO JR} and Daniel Ribeiro Gomes",
         title="Classificação de Imagens Coletadas na Web",
         address={Belo Horizonte MG Brasil},
         school={Universidade Federal de Minas Gerais,
                 Instituto de Ciências Exatas,
                 Departamento de Ciência da Computação},
         year=2001}
@ARTICLE{athitsos97distinguishing,
    author = "V. {Athitsos} and M.J. Swain and C. Franke",
    title = "Distinguishing Photographs and Graphics on the {World Wide Web}",
    journal="Workshop in Content-based Access to Image and Video Libraries",
    address={San Juan Puerto Rico},
    year=1997,
    month=jun}

@ARTICLE{frankel96webseer,
    author = "Charles {Frankel} and Michael J Swain and Vassilis Athitsos",
    title = "WebSeer: An Image Search Engine for the World Wide Web",
    journal = "IEEE Computer Vision and Pattern Recognition Conference",
    address= {Chicago USA},
    year = 1996,
    month = jun}

@INTERNET{introR,
         author="W. N. {Venables} and D. M. Smith and the R Development Core Team",
         title = "An Introduction to {R}",
         internetaddress = "http://www.r-project.org/",
         day=15,
         month=dec,
         year=2002
         }

@BOOK{kaufman,
      author={Leonard {Kaufman} and Peter J. Rousseeuw},
      title = {Finding  groups  in  data},
      subtitle = {An  introduction  to cluster analysis},
      publisher = {J. Wiley},
      address = {New York USA},
      year = 1990
      }