Marathe et al. (1994); Matsui (2000). Marathe, Madhav V.; Breu, Heinz; Hunt, III, Harry B.; Ravi, S. S.; Rosenkrantz, Daniel J. (1994), Geometry based heuristics for unit disk graphs, arXiv:math.CO/9409226, Bibcode:1994math......9226M. Matsui, Tomomi (2000), "Approximation Algorithms for Maximum Independent Set Problems and Fractional Coloring Problems on Unit Disk Graphs", Discrete and Computational Geometry, Lecture Notes in Computer Science, vol. 1763, pp. 194–200, doi:10.1007/978-3-540-46515-7_16, ISBN978-3-540-67181-7.
Marathe et al. (1994); Matsui (2000). Marathe, Madhav V.; Breu, Heinz; Hunt, III, Harry B.; Ravi, S. S.; Rosenkrantz, Daniel J. (1994), Geometry based heuristics for unit disk graphs, arXiv:math.CO/9409226, Bibcode:1994math......9226M. Matsui, Tomomi (2000), "Approximation Algorithms for Maximum Independent Set Problems and Fractional Coloring Problems on Unit Disk Graphs", Discrete and Computational Geometry, Lecture Notes in Computer Science, vol. 1763, pp. 194–200, doi:10.1007/978-3-540-46515-7_16, ISBN978-3-540-67181-7.
Marathe et al. (1994); Matsui (2000). Marathe, Madhav V.; Breu, Heinz; Hunt, III, Harry B.; Ravi, S. S.; Rosenkrantz, Daniel J. (1994), Geometry based heuristics for unit disk graphs, arXiv:math.CO/9409226, Bibcode:1994math......9226M. Matsui, Tomomi (2000), "Approximation Algorithms for Maximum Independent Set Problems and Fractional Coloring Problems on Unit Disk Graphs", Discrete and Computational Geometry, Lecture Notes in Computer Science, vol. 1763, pp. 194–200, doi:10.1007/978-3-540-46515-7_16, ISBN978-3-540-67181-7.