A Canonical Model for a Class of Areal Spatial Objects.

http://dx.doi.org/10.1007/3-540-56869-7_3 Michael F. Worboys Petros Bofakos A Canonical Model for a Class of Areal Spatial Objects. 36-52 SSD/1993/P036.pdf 1993 conf/ssd/93 SSD db/conf/ssd/ssd93.html#WorboysB93