The following publications are possibly variants of this publication:
- H-coloring degree-bounded (acyclic) digraphsPavol Hell, Aurosish Mishra. TCS, 554:40-49, 2014. [doi]
- On homomorphisms to acyclic local tournamentsPavol Hell, Huishan Zhou, Xuding Zhu. jgt, 20(4):467-471, 1995. [doi]
- The Dichotomy of List Homomorphisms for DigraphsPavol Hell, Arash Rafiey. soda 2011: 1703-1713 [doi]
- Homomorphisms to powers of digraphsRichard C. Brewster, Pavol Hell. DM, 244(1-3):31-41, 2002. [doi]