Properly Colored Geometric Matchings and 3-Trees Without Crossings on Multicolored Points in the Plane - Discrete and Computational Geometry and Graphs - page 111

3. Kaneko, A., Kano, M.: Discrete geometry on red and blue points in the plane — a
survey —. In: Aronov, B., Basu, S., Pach, J., Sharir, M. (eds.) Discrete and Compu-
tational Geometry. Algorithms and Combinatorics, vol. 25, pp. 551-570. Springer,
Heidelberg (2003)
4. Kano, M., Suzuki, K.: Discrete geometry on red and blue points in the plane lattice.
In: Pach, J. (ed.) Thirty Essays on Geometric Graph Theory, pp. 355-369. Springer,
New York (2013)
5. Larson, L.C.: Problem-Solving Through Problems. Problem topics in Mathematics.
Springer, New York (1983)