Juliano Lopes de Oliveira Marcos André Gonçalves Claudia Bauzer Medeiros A Framework for Designing and Implementing the User Interface of a Geographic Digital Library. 190-206 1999 2 Int. J. on Digital Libraries 2-3 http://link.springer.de/link/service/journals/00799/bibs/9002002/90020190.htm db/journals/jodl/jodl2.html#OliveiraGM99