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References
- ↑ Bredeweg, Bert, and Kenneth D. Forbus. "Qualitative modeling in education." AI magazine 24.4 (2003): 35.
- ↑ Latecki, Longin Jan. Discrete representation of spatial objects in computer vision. Vol. 11. Springer Science & Business Media, 1998.
- ↑ Zenon Kulpa: Professional Biography, last updated 2009. Accessed at archive.org. 04.2015.
- ↑ Zenon Kulpa at DBLP Bibliography Server
