@article{article, title  = {{Lehman's Theorem and the Directed Steiner Tree Problem}},

 publisher = {{Society for Industrial & Applied Mathematics (SIAM)}},

 url = {{http://dx.doi.org/10.1137/15m1007185 }},

 year = {{2016}},

 month = {{1}},

 author = {{Abdi A and Feldmann AE and Guenin B and Könemann J and Sanità L}},

 doi = {{10.1137/15m1007185}},

 volume = {{30}},

 journal = {{SIAM Journal on Discrete Mathematics}},

 issue = {{1}},

 pages = {{141-153}},

 note = {{Accessed on 2024/12/22}}}