Tomizawa, N. (1971). "On some techniques useful for solution of transportation network problems". Networks. 1 (2): 173–194. doi:10.1002/net.3230010206. ISSN1097-0037.
Tomizawa, N. (1971). "On some techniques useful for solution of transportation network problems". Networks. 1 (2): 173–194. doi:10.1002/net.3230010206. ISSN1097-0037.