A Small Set of Formal Topological Relationships Suitable for End-User Interaction.

http://dx.doi.org/10.1007/3-540-56869-7_16 Eliseo Clementini Paolino Di Felice Peter van Oosterom A Small Set of Formal Topological Relationships Suitable for End-User Interaction. 277-295 SSD/1993/P277.pdf 1993 conf/ssd/93 SSD db/conf/ssd/ssd93.html#ClementiniFO93