1. A note on two problems in connection with graphs;Dijkstra;Numerische Mathematik,1959
2. Linear Programming and Network Models;Gupta,1986
3. A minimax problem as a linear programming problem;Gupta;Opsearch,1982
4. On the shortest spanning subtree of a graph and travelling salesman problem;Kruskal,1956
5. Combinatorial Optimization: Networks and Matroids;Lawler,1976