1. Gallager, R., "A Minimum Delay Routing Algorithm Using Distributed Computation," IEEE Trans. on Communication, vol. COM-25, 1974, pp. 73–85.
2. Gallager, R., "Scale Factors for Distributed Routing Algorithms," Paper ESL-P-770, Electronic Systems Lab., Massachusetts Institute of Technology, Cambridge, Mass., August 1977.
3. Goldstein, A. A., "Convex Programming in Hilbert Space," Bull. Amer. Math. Soc., Vol. 70, 1964, pp. 709–710.
4. Levitin, E. S. and B. T. Polyak, "Constrained Minimization Problems," USSR Comput. Math. Math. Phys., Vol. 6, 1966, pp. 1–50.
5. Bertsekas, D. P., "Algorithms for Optimal Routing of Flow in Networks," Coordinated Science Lab., University of Illinois, Urbana, Ill., June 1978.