@article{HamRud:61,
  journal = {Com. Acad. R. P. Rom\^{a}ne},
  volume = {11},
  title = {Sur la solution du probl\`eme des transports par la m\'ethode de
           Egerv\'ary},
  author = {Hammer, Peter and Rudeanu, Sergiu},
  year = {1961},
  pages = {773--778},
}