Toll, D.G. (2007) Representing Slopes in XML, Proc. Specialized Session S02, 11th ISRM Congress, Lisbon (eds. D.G. Toll & Z.Y. Chen), pp. 13-17 (on CD).
Toll, D.G. (2007) 
Representing Slopes in XML, Proc. Specialized Session S02, 11th ISRM Congress, Lisbon (eds. D.G. Toll & Z.Y. Chen), pp. 13-17 (on CD).