@article{10_4153_CJM_1974_136_9,
     author = {Gomory, R. E. and Hu, T. C. and Yohe, J. M.},
     title = {R-separating {Sets}},
     journal = {Canadian journal of mathematics},
     pages = {1418--1429},
     year = {1974},
     volume = {26},
     number = {6},
     doi = {10.4153/CJM-1974-136-9},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1974-136-9/}
}