TY - JOUR A1 - Assuncao, R.M. A1 - Neves, M.C. A1 - Camara, G. A1 - Da Costa Freitas, C. T1 - Efficient regionalisation techniques for socioeconomic geographical units using minimum spanning trees Y1 - 2006 DO - 10.1080/13658810600665111 JF - International Journal of Geographical Information Science VL - 20 IS - 7 ER -