Aditya Vailaya Mário A. T. Figueiredo Anil K. Jain HongJiang Zhang Content-Based Hierarchical Classification of Vacation Images. 518-523 1999 ICMCS, Vol. 1 http://computer.org/conferen/proceed/icmcs/0253/Volume%201/02539518abs.htm db/conf/icmcs/icmcs99-1.html#VailayaFJZ99