by Ravindra K. Ahuja, James B. Orlin and Robert E. Tarjan.
Also issued as: Working paper (Sloan School of Management) ; WP no. 1966-87
Includes bibliographical references (p. 18-19).
Research supported by the National Science Foundation. DCR-8605962 Research supported by the Office of Naval Research. NOOO14-87-K-0467