Ross S. Purves
and Paul Clough
and Christopher B. Jones
and Avi Arampatzis
and Benedicte Bucher
and David Finch
and Gaihua Fu
and Hideo Joho
and Awase Khirni Syed
and Subodh Vaid
and Bisheng YangInternational Journal of Geographical Information Science21
717-745
(2007)