BALSTRØM, T. Beng Chin Ooi: Efficient Query Processing in Geographic Information Systems. - (Lecture notes in Computer Science 471). Geografisk Tidsskrift, [S. l.], v. 92, 1992. Disponível em: https://tidsskrift.dk/geografisktidsskrift/article/view/44891. Acesso em: 8 maj. 2024.