Elli Pagourtzi Kostas S. Metaxiotis Konstantinos Nikolopoulos Konstantinos Giannelos Vassilis Assimakopoulos Real estate valuation with artificial intelligence approaches. 50-57 2007 2 IJISTA 1 http://dx.doi.org/10.1504/IJISTA.2007.011573 db/journals/ijista/ijista2.html#PagourtziMNGA07