Jiong Guo, Rolf Niedermeier, Ondrej Suchý. Parameterized Complexity of Arc-Weighted Directed Steiner Problems. SIAM J. Discrete Math., 25(2):583-599, 2011. [doi]
@article{GuoNS11,
title = {Parameterized Complexity of Arc-Weighted Directed Steiner Problems},
author = {Jiong Guo and Rolf Niedermeier and Ondrej Suchý},
year = {2011},
doi = {10.1137/100794560},
url = {http://dx.doi.org/10.1137/100794560},
researchr = {https://researchr.org/publication/GuoNS11},
cites = {0},
citedby = {0},
journal = {SIAM J. Discrete Math.},
volume = {25},
number = {2},
pages = {583-599},
}