@article{oai:soar-ir.repo.nii.ac.jp:00012898, author = {TAKEUCHI, Yukio}, journal = {信州大学工学部紀要}, month = {Jul}, note = {Article, 信州大学工学部紀要 44: 11-14 (1978)}, pages = {11--14}, title = {On a Theorem Concerning Minimization Problems on a Network}, volume = {44}, year = {1978} }