1. An automated frequency assignment system for air voice communication circuits in the frequency band from 225 MHz to 400 MHz;Beall,1977
2. Theory of Graphs;Berge,1967
3. Graph Theory with Applications;Bondy,1976
4. The solution of the graph coloring problem as a set-covering problem;Cameron;IEEE Trans. EMC,1977
5. Frequency assignment for collocated transmitters using the branch-and-bound technique;Capraro,1972