Karl Nickel. Transportprobleme und Graphentheorie. Math. Meth. of OR, 11(1):144-150, 1967. [doi]
@article{Nickel67-0, title = {Transportprobleme und Graphentheorie}, author = {Karl Nickel}, year = {1967}, doi = {10.1007/BF01922393}, url = {http://dx.doi.org/10.1007/BF01922393}, researchr = {https://researchr.org/publication/Nickel67-0}, cites = {0}, citedby = {0}, journal = {Math. Meth. of OR}, volume = {11}, number = {1}, pages = {144-150}, }