The following publications are possibly variants of this publication:
- Parameterized Complexity of Arc-Weighted Directed Steiner ProblemsJiong Guo, Rolf Niedermeier, Ondrej Suchý. isaac 2009: 544-553 [doi]
- Parameterized Complexity of Directed Steiner Tree on Sparse GraphsMark Jones, Daniel Lokshtanov, M. S. Ramanujan, Saket Saurabh, Ondrej Suchý. esa 2013: 671-682 [doi]
- Parameterized Complexity of Directed Steiner Tree on Sparse GraphsMark Jones, Daniel Lokshtanov, M. S. Ramanujan, Saket Saurabh, Ondrej Suchý. siamdm, 31(2):1294-1327, 2017. [doi]