by Worboys, Michael | Duckham, Matt.
by Goodchild, Michael F.
by Nogueras-Iso, Javier | Muro-Medrano, Pedro R | Zarazaga-Soria, F. Javier.
by Lo, C. P | Yeung, Albert K. W.
by Heywood, Ian.
by Akerkar, Rajendra.
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